Everybodies SLAP = Saboted Light Armor Penetrator Scott's SLAP = SABOTAGED Light Armor Penetrator

@CarolinaGunGuy

2 жыл бұрын

Pinned this comment. 👍

@Lemon_tea104

Жыл бұрын

I agree with @MrZ It was probably a spicy round

@robwhite6057

Жыл бұрын

@@Lemon_tea104 Yes there is another test of the gun and catridge that showed someone had used the wrong boom powder, apparently for a handgun rather than rifle.

@Lemon_tea104

Жыл бұрын

Dualy noted

This mirrors my own assessment, myself being a mechanical engineer. The overall design of the gun appears safe in the sense of normal operation. However I caveat that in that if the gun does have a catastrophic failure it does not have a safety mechanism to divert the release of pressure away from the shooter. A better design would have a designed failure mode to divert the failure.

@RConradBane

3 жыл бұрын

If something isn't fail-safe, is it safe?

@A1V124

3 жыл бұрын

@@RConradBane Would you drive a pinto?

@coldwaterjimmy7044

3 жыл бұрын

@@A1V124 I used to own and drive a Ford Pinto a long time ago ... 'Nuf said ... Lol

@RConradBane

3 жыл бұрын

@@coldwaterjimmy7044 a lot of people did. I'm not going to go out looking for one now, though.

@MrBigdragon2009

3 жыл бұрын

@@A1V124 Yes I did and the felt the bad decision on the fuel tank was over blown. Yes it could have been better, the engineers designed it better, the accountants vetoed the fuel cell for a steel tank

There are still to many eggplants out there to kick for Scott to succumb to any injury. He's one tough cookie.

@RamTahoe

3 жыл бұрын

Indeed he's a beast!

@memesfromdeepspace1075

3 жыл бұрын

If someone get same accident and they thin or have less experience about wound they probably gonne .

@BrooklynBalla

3 жыл бұрын

@@RamTahoe Beast or not, he only survived because luckily he had someone with him to help through his shock.He would’ve been a goner if help wasn’t close by.

@RamTahoe

3 жыл бұрын

@@BrooklynBalla believe me I'm very well aware how dire that situation was. If knowledge and ability to handle circumstances as such wasn't available as it was the outcome wouldn't have been good. As horrific as that was, it was handled very well

@woodstockjon420

3 жыл бұрын

What's an eggplant?

A sane review of the situation from an actual owner - thank you.

I’m just glad someone who seems to know what they’re talking about would post a video

@ronaldwhitman1377

3 жыл бұрын

There's been plenty of them

@jesuschristislord7754

3 жыл бұрын

I don't know what I'm talking about but that gun still looks like it was crafted in a zombie survival game using plumbing gear.

@Halfstep2024

3 жыл бұрын

There has indeed been plenty of them, even before Scott’s incident and they have all said the same thing. The vapors having nowhere to escape behind the shell in the event it gets past the casing backwards makes it abhorrently unsafe as this has been standard practice in safety protocol for decades. The fact that this gun relies solely on the cap and the ears of the lower to hold such forces as a primary and secondary safety and NEITHER do anything to relieve that pressure away from the shooter is laughably dangerous.

@jesuschristislord7754

3 жыл бұрын

@@Halfstep2024 I literally don't know what I'm talking about but the gun looks like a joke. Looks like something my kid would draw.

@Halfstep2024

3 жыл бұрын

@@jesuschristislord7754 the reason it looks like something a kid would make is because it kinda was 🤷🏻‍♂️😂

Human nature mystifies the hell out of me at times... We see a rare failure with too many questionable aspects and people immediately start making suppositions as to how dangerous the gun is and that it should be pulled from the shelves and closets and taken apart never to be used again. When people drive their cars in crazy and dangerous manners and a death occurs, no one tries to start a movement to pull all the cars from the road... why is that the case????

@twatmunro9563

3 жыл бұрын

How many of these rifles have been manufactured? When you're talking about thousands or hundreds of thousands, you can talk about a 'rare failure'. When you're talking about tens, the word 'rare' isn't really applicable.

@ShockValue500

3 жыл бұрын

@@twatmunro9563 As stated at timestamp 1:04 , there are about 1,400 RN-50's manufactured.

@blade913

3 жыл бұрын

It's an evolutionary thing, consider your an animal in the wild. You are doing god knows what, perhaps climbing a tree for fruit. Then you observe an animal approach a nearby watering hole. All is well, the animal drinks and leaves. Perhaps the next day you head toward the watering hole, thirsty from the day. But you see the same animal near the water, dead. No wounds, no damage or injury. Just lifeless. We observe danger, and out of self preservation we stay away from what we believe is dangerous. Intelligence has allowed us to overpower this instinct in some ways, but it's still ingrained in our being.

@LocalDeepstateAgent

3 жыл бұрын

@@twatmunro9563 First of all, even if i make 10 guns and one of them has a breakdown. It is still a rare failure due to there only being 10 produced. If there were 2 or 3 that had a catastrophic failurey you obviously couldnt talk it down to it being a rare case. With the serbu, we got 1400 produced with one having a catastrophic failure. Thats as rare as it gets. But not is it just rare, it wasnt even a failure faulted by the guns design. Those rounds Scott were firing werent just by far outside the league the serbu can handel, they were also tempered with as scott said himself. Even a barret 50 would have broken down if you fired a mag worth of bullets out of it. After all, you wouldnt pump nitroglycerine into your car and go for a spin. So please, unless you're sure its the manufactures fault, dont try to devalue others arguments. Mr.Serbu is a honest man that makes a honest living. If he knew his gun is dangerous by bad design he would have halted production and called back all 1400 by himself.

@toomanyaccounts

3 жыл бұрын

@@LocalDeepstateAgent a Barrett will blow up if you pull back the charging handle on a hang fire that decides to go off just then. that is normal pressure round mind you. seen photos of one that happened to the shooter was lucky they didn't lose most of their face or an eye or die. the rifle was split in half. a .50 bmg round loaded with pistol or magnum or that was underloaded would also potentially turn a Barrett into shrapnel.

it's nice to see someone look at this with a cool head and not claim the sky is falling the sky is falling. when they see a leaf blowing in the wind.

@ETHRON1

3 жыл бұрын

👍

@jussayinmipeece1069

3 жыл бұрын

i cannot say i agree with you. Here is why. In my opinion the gun lacks the multiple layers of safety that experience has told us are necessary and that have become standard on all modern firearms. This is a fact not speculation. We have become complacent because technology has allowed repetitive, safe and consistent cartridge loading so some designers have forgotten the hard learnt lessons of the past. There is no over pressure release. There is no directional blast director There is nothing to prevent the "bolt" from taking a direct route through the shooters face. There is no secondary obstruction in case the "bolt" detaches and the "locking lugs" fail. Every modern rifle is designed so in the event of an over pressure event pressure will be directed away from the shooter. There is no such failsafe in this forearm. Pressure can go one of only two ways, out the front or out the back So is the gun unsafe? Unquestionably YES.

@squirlboy250

3 жыл бұрын

Run Chicken Little RUN!

@danielsoto8934

3 жыл бұрын

@@jussayinmipeece1069 exactly. On a average firearm the pressure's coming out the barrel and ejection port. This poorly designed gun is a ticking time bomb waiting to blow up in your face.

@toomanyaccounts

3 жыл бұрын

@@danielsoto8934 wrong. any .50 bmg would have exploded when you shove a pipe bomb in the chamber. A barrett will be blown apart on a regular pressure .50 bmg if you happen to be trying to eject what you think is a dud round but is instead a hangfire.

My RN50 is 915 and works grate !! mine is 33 lbs. full 36" long Bull barrel .new info 160,000 LB was tested by Mark to brake it !!! I load my own ! no question !!

@GudrezBilly

3 жыл бұрын

He ran the numbers, he hasn't tested blowing a gun up yet. But yeah the theoretical number for the end cap threads was 161,000+. I envy you having that gun, someday I hope to have my own!

@johnhodges8264

3 жыл бұрын

GREAT!

@luvmechanix

3 жыл бұрын

Werks Grate!!!1

@Truckerdaddy

3 жыл бұрын

Whats the price tag on one of these

@robsdeviceunknown

3 жыл бұрын

Not sure I would trust reloads from someone with a 3rd grade education.

Came back here from Scott's newest video where he recreates his accident. The gun is 100% not at fault. It is an extremely simplistic, hardy design for shooting .50 BMG, and very unlikely to fail under normal operating conditions; his new one ate 12 EXTREMELY HOT SLAP rounds and didn't grenade like the overcharged one did. It was only when he loaded a custom round made EXPLICITLY to mirror the near 200k pounds of pressure from the bad round that nearly killed him, that the new RN-50 detonated THE EXACT SAME WAY. Cap blown off, stock ripped away, and ears bent to hell. Your gun, no matter what brand or caliber, _WILL NOT SURVIVE AN OVERCHARGED ROUND._ You can argue built-in safeties all you want; this was a freak accident with counterfeit ammo. The real lesson from all this is to always check your ammo, especially when it's a big boy like .50 BMG. Your Barrett is still a frag grenade next to your face if your ammo's gone bad. And if you're one of those bots that keep blaming the gun while ignoring every update from both Serbu AND Scott, then you're a fucking idiot. Check your facts before running your stupid mouth or wasting keyboard strokes with your stupid fingers.

One of the possible culprits that Mark mentioned in his latest video, is the accidental use of pistol powder in the slap round. If thats the case, it doesn't matter what rifle or calibre you use, the result will be a catastrophic blow-up.

@phalanx3803

3 жыл бұрын

he also said on the low end it would take a chamber pressure of around 160,000 psi to make the cap come off the gun like that some one must have gotten there powder from the devil even tanks dont go that high from what i can find the M256 gun has a normal peak pressure around 96,000 on the high end.

@NoName-hs4ov

3 жыл бұрын

@@phalanx3803 Yeah this gun design is sketchy AF. 4 threads on the cap is what you bet your life on....lol this gun is trash.

@phalanx3803

3 жыл бұрын

@@NoName-hs4ov if you can't trust some threads then why do you drive a fucken' car or fly on a plane we use threads everywhere.

@greatleader4841

3 жыл бұрын

@@phalanx3803 Don't let him know that his roof and walls are held in by threads....he might not like that.

@jonathanchark5291

3 жыл бұрын

It's actually a very sound and strong design that also used on some field cannons and torpedo launchers and such. Any handheld or shoulder fired gun would have failed at over 160,000 psi, regardless of the design. And this is one of the strongest action types available. The locking lugs of most other rifles are essentially large interrupted threads that interface with more interrupted threads inside the chamber. The RN 50 has full uninterrupted threads around the entire circumference of breech/chamber, giving it even more security and two thick layers of steel for support, plus the ears.

It is correct to say this is a safe firearm. It is also correct to say if it fails, it fails towards your face. The quest for a light .50 comes with some risk.

@Watchdog_McCoy_5.7x28

3 жыл бұрын

It's not really all that light though, except the price tag in comparison to other 50 bmgs.

@Str8Haste

3 жыл бұрын

@@Watchdog_McCoy_5.7x28 True, it's only 4-6 lbs. lighter than your average bolt action .50 rifle. But, even 4 lbs. of receiver behind the chamber may have made a significant difference in redirecting pieces of the thing from going straight backwards. This rifle really has no receiver, that's where they saved the weight.

Man you made lightning and it struck twice with what you shared to me. What you said about society and instant justice is spot on and it is ruining our way of life. Many things in life require more time to asses than the time it takes to pick up your phone and open your social media app and start the first bad roomers. And the second one about being jealous that I don't have that firearm? Oh yeah you got that right!!

me after he said he would shoot it: "SWEATING PROFUSLY"

@wolpfy2591

3 жыл бұрын

Need a thumb for that?

Bet they beef up those 'ears' anyway. No reason not to.

@phoenixrising4573

3 жыл бұрын

Probably more in an effort to avoid shearing under an extreme failure like this, at to deflect any failure upwards and away from the shooter.

@MrT13

3 жыл бұрын

Definitely. Pin failed too but at least if pins don’t shear that’s one less thing I guess...

@CS-zn6pp

3 жыл бұрын

Considering the forces MS has calculated were needed to blow the cap off (161,000+lbs) I'm not sure the "ears" can be strengthened to withstand that force without a complete redesign. Tbh, I think that round would have blown up any gun you put it in.

@MrT13

3 жыл бұрын

@@CS-zn6pp disagree.

@NickyTavic

3 жыл бұрын

Honestly I think extending what the ears are right now all the way to the back where the stock connects would make the same failure way less likely if not impossible.

One way for Mark To test it is to put a very hot round in that gun and fire it a bunch of times to see if it fails like it did for Scott

@sdqsdq6274

2 жыл бұрын

yea ..........less talk more rock

New sub here.. Thanks for "keeping it real".. I look forward to the updates you will undoubtedly provide!

I've had one on order for over a year now. Seen all the videos and I'm also an engineer. I trust the design and Mark Serbu. I've owned a few of his guns with zero incidents.

Great vid. Backyard Ballistics was the only other vid besides Scott’s and Serbu’s I’ve watched..

@sixchuterhatesgoogle3824

3 жыл бұрын

Check out the video by TiborasaurusRex.

@sixchuterhatesgoogle3824

3 жыл бұрын

@Adolf Hitler Right. A former sniper quoting a book written by a Special Forces sniper is "idiotic". You need to pull your head out of your posterior orifice.

@Billsbob

3 жыл бұрын

@Adolf Hitler I’ve seen several people claiming you can’t fire the slap round in certain 50’s, but they don’t explain why and the closest explanation that makes sense is that the tungsten tip would scratch the chamber. The idea that a chunk of plastic would become so thoroughly lodged in the muzzle break that it could cause a pressure spike long enough to send more than 74,000psi out the back of the gun instead of the front is hard to swallow

@johnmutz9919

3 жыл бұрын

Anxiously awaiting full review, seems like wrong powder load. Hoping for quick recovery for scott. Miss "WATERMELON TIME"

@alanaliyev456GT

3 жыл бұрын

@Adolf Hitler i prefere MAUSER Bolt i love germania guns !

Thank you for your sensible sober analysis of this unfortunate episode.

If those ears behind the breach cap were a little taller and extended all the way back to the stock I don't think Scott would have been hurt as badly.

@OxC-BIRD

3 жыл бұрын

I agree but would add like a bridge between both and have it go as far back as possible, like a old break barrel shotgun.

@rottenmeat5934

3 жыл бұрын

@thedog556 Doubtful. Any other gun would have produced much smaller and infinitely more fatal shrapnel. There actually was a cheap .50 cal way back and it threw the bolt into a few shooters’ faces.

@darek4488

3 жыл бұрын

I feel the same way. If they kept the lower frame straight without this stupid cut-out at the top, than the failure would have been a little bit less deadly. As at least it wouldn't produce a shrapnel.

@jameslovallo9603

3 жыл бұрын

As a welder who deals with metal fatigue, and similar issues, a taller pair of ears wouldn't do much to distribute the force. They would have to be taller and extend back further towards the buttstock

@darek4488

3 жыл бұрын

@@jameslovallo9603 Someone did that cut behind them. It could easily be flat, yet someone did the extra work to make it weaker.

Please consider *SUBSCRIBING* if you haven't already. Thanks! (And for the record, I had never heard of Doug Demuro until people starting commenting about him. I'll have to watch some of his videos.)

@PrinceAlhorian

3 жыл бұрын

Excellent video, I have subscribed sir.

@carlreiner30

3 жыл бұрын

Great video

@Biden_is_demented

3 жыл бұрын

I think you are wrong, the gun is not safe. If you engage in a little thought experiment, try to imaging melting the metal that forms the threads, and use it to form a single solid locking lug, and then see how big (or how small) it is. There just isn´t enough metal to safely hold back a 50 cal. Even worse, the threads are of the wrong kind. You need squared cross section threads, not pyramidal threads. (As an example, big lathes use these squared threads by design, because they are subjected to tremendous forces too.) The very nature of those pyramidal or triangular threads means the tip of the threads are very thin. They are thick at the base, but the biggest forces are going to be at the middle of where both the barrel threads and cap threads meet. If we imagine a cross section of the threads, featuring the bottom ones (barrel) and top ones (cap), we can then picture a line across them at the center. That´s where the forces are going to be higher. But in that spot, the thickness of the metal is just half of what it is at the base. And considering you only have 4, maybe 5 of them, there is just not enough metal. I think an accident was just bound to happen. Just my 2 cents.

@wahman13

3 жыл бұрын

Well i would love to see anyone shoot an over presurized bullet that needs to squeeze its self down the berrel i would say he was lucky the round exited the gun or his hole on his neck would have been see through

@DawsonTyson

3 жыл бұрын

I believe I may have found something of interest for this particular incident. "Dirty trick of the Syrian Civil War: Spiked Ammo"

I wonder why the tabs on the frame aren't just carried on to the stock rather than dipping down and back up? It would make them impossible to break off

@josephaust2424

3 жыл бұрын

I was thinking the same thing. At least to reduce the small shrapnel sheer point that happened in scotts case. Albeit unlucky to happen again.

@smllboy25

3 жыл бұрын

Because the gun is a cheap piece of shit, that's why

@l.h.9747

3 жыл бұрын

It looks like thats needed to have proper access to the trigger mechanism

@l.h.9747

3 жыл бұрын

@@smllboy25 if it was for economical reasons the steel there wouldnt be removed because thats more work to do.

Would I be correct calling the threads an "uninterrupted thread locking lug" as opposed to interrupted thread locking lugs?

Nice video with great perspective 👍 I completely agree with you.

What if the frame was redesigned, and instead of having the "ears," the frame was the same height all the way back? Could it be done and would it be a much safer design?

@lanmichaelmix2818

3 жыл бұрын

exactly,they should immediately change the design now.Also adding mechanism for cocking the hammer indirectly due to that design.Make a cheap product that is unsafe is unacceptable.

@refraggedbean

3 жыл бұрын

this was the first thing I thought of looking at it, you could probably better distribute the load if at least the top portion was supported too if not the entireback edge, also a slight further thickening of the frame could also further add to the safety, I understand the design of the gun, but also in the wake of this incident I definitely wouldnt shoot that gun without a redesigned frame as even though it is a rare failure, its hard to ignore an obvious potential failure point thats right next to your face

@Norussain3574

3 жыл бұрын

No It would make it more dangerous by not giving the cap a brice will make it more easy to pop off

@GarageFab

2 жыл бұрын

Glad you mentioned it so I didn’t have to. It appears the “ears” were a cosmetic design. I don’t see why eliminating the dip in the upper would cause any operational problems. But I don’t own one so I’m just guessing.

@Norussain3574

2 жыл бұрын

@@GarageFab np

Thanks for the refreshing, level headed take on this. It's easy to hop on the wagon and say the gun is bad, but it isn't easy to say that we need to wait for all the facts first. Great to hear an owners take on this. Worth a sub in my opinion.

So what is the shear strength of the pin that keeps the upper and lower together? I wonder if that failed first allowing the rest to come apart? In your slow mo video it looks like there is some separation as the rifle fires at that pin.

@toomanyaccounts

3 жыл бұрын

the counterfeit round would have blown up any .50 cal gun. a ma deuce would be blown up. a barret semi auto would have blown up.

Excellent presentation! I saw Scott's video before any other, and I've watched it a couple of times. At no time does he blame anyone other than himself for the incident. His gun had a modified barrel specifically so that he could chamber a SLAP round. According to the information in your video, the gun was rated at over 300% of the standard pressures that a stock .50 BMG round would generate, and something happened to EXCEED that! I like that you did your research, and that you didn't go into some torches and pitchfork rant on the issue at hand. You just got yourself a new subscriber!

@ernestieschevalier3774

3 жыл бұрын

Saboted ammunition and muzzle devices Saboted ammunition use an accelerator (often made of plastic) to propel a much smaller projectile in a large bore. An example of such ammunition is a saboted light armor penetrator (SLAP), like for example the 12.7×99 mm round designated as M962. Muzzle devices, like a flash suppressor, muzzle brake or choke, and with muzzle brakes in particular, can cause material buildup from copper, lead, etc. upon firing. In particular, firing of saboted ammunition in firearms with muzzle devices can leave behind residue in the bore upon firing, which can cause an increase in barrel and chamber pressure in subsequent firing. The Hard-Target Interdiction sniper manual contains the following warning on page 411:[2] Do not fire any style saboted ammunition in a weapon fitted with a muzzle brake, compensator, flash hider or shotgun choke unless you are sure that they are compatible. - Dean Michaelis, Complete .50-Caliber Sniper Course : Hard-Target Interdiction (2000) The manual goes on to say that such obstructions may be hard to detect upon visual inspection, and that the obstruction is likely to become dislodged and thus be not be discoverable after a catastrophic failure. It is also known that other obstructions in the bore, such as ice, mud or even moisture, can cause similar increases in barrel pressure.[3]

Even Scott said it was safe, it was just the Slap rounds that were unsafe

@user-el4ii7zq6l

3 жыл бұрын

I'm not trusting in 4 threads with my life. The gun is a bad Design.

@Lattidude

3 жыл бұрын

@@user-el4ii7zq6l Multiple people have done the math and determined it would take 160,000lbs of pressure to shred those threads but okay

@brazed420

3 жыл бұрын

@@user-el4ii7zq6l the first 3 threads take over 80% of the load

@mickeydee3595

3 жыл бұрын

@@Lattidude some people got not clue "bUt iTs oNly GoT 4 tHrEaDs!"

I remember when Scott’s gun blew up, I was sad and worried that he was going to quit shooting but I’m glad that he survived, recovered, and continues to shoot

Would it be possible to extend the secondary safety (ears) all the way back?

Well presented. Great information and tactful done!

Most likely it was a really hot slap round, in scotts vid he talks about the inconsistency in the rounds he was shooting and you can see how the rounds reacted differently, I’m so glad he’s ok but I’m not sure people should continue shooting rounds that are extremely old such as the slap rounds

Would it not be better if instead of ear lugs, have solid sides all the way back to the but and a higher plate behind the breach cap?

I looked at that .50, only saw the short barrel version available and given the cost difference and better function (simpler reloading), I opted for the Noreen ULR 50, about 7 weeks left till its built...

Greetings from Whitsett NC. I think your assessment was absolutely fair. I’ve shot several Barrets 50’s but don’t own a 50 of any make. In fact the day I saw KB’s video, I had been at the range and shot a few rounds through a Barrett A1. The rifle was substantial and weighed in at about 35 pounds. Recoil is just at another level compared to anything I normally shoot. The bolt seemed to approximate the diameter of a shovel handle. Watching Scott’s video horrified me. Truly the grace of God and something good will come from it. I do agree the RN-50 is safe but it is a minimalistic design compared to other offerings. If it was was a muzzle break / sabot issue, the shooting community does need to know. I too wish Scott well & speedy recovery. Thanks for your video.

Well, it ain't the first gun to blow up... and I'm sure it won't be the last. Plenty of folks have had nasty failures when firing high pressured rounds from their Glocks that were equipped from the factory with those infamous recessed chambers. We've learned not to run weakened, reloaded brass through them unless we've gotten an aftermarket barrel with the chamber support to do so. Yeah, this is different but not too much. If we CAN'T learn from each others mistakes then we're all doomed to repeat the same ones & that's no fun for anybody. I'm glad Scott came fourth to share his incident with the world. By making the rest of us a little more cautious & aware of how precious life is, he may have saved a number of lives in the future. It's really sad that the incident had to happen but I'm proud of him for handling it like he did, without some BS ego getting in the way. Modesty & humanity is what keeps us in check. We're all human. It's important to remember that none of us is gonna catch every mistake before it happens. But most importantly of all, I'm glad he's alright 👍.

@MrProfchaos71

3 жыл бұрын

Agreed but what matters is what happens when they explode. As in where does the pressure go ? In this case the pressure goes into your face.

@Magisktification

3 жыл бұрын

No we have learned to not rely on a Glock. If im gonna buy a cheap gun then upgrade it i can by a better gun to begin with and the end result will be better too.

@shanepeters2849

3 жыл бұрын

Can you elaborate on Shooting reloads thru glock please.

@ernestieschevalier3774

3 жыл бұрын

Saboted ammunition and muzzle devices Saboted ammunition use an accelerator (often made of plastic) to propel a much smaller projectile in a large bore. An example of such ammunition is a saboted light armor penetrator (SLAP), like for example the 12.7×99 mm round designated as M962. Muzzle devices, like a flash suppressor, muzzle brake or choke, and with muzzle brakes in particular, can cause material buildup from copper, lead, etc. upon firing. In particular, firing of saboted ammunition in firearms with muzzle devices can leave behind residue in the bore upon firing, which can cause an increase in barrel and chamber pressure in subsequent firing. The Hard-Target Interdiction sniper manual contains the following warning on page 411:[2] Do not fire any style saboted ammunition in a weapon fitted with a muzzle brake, compensator, flash hider or shotgun choke unless you are sure that they are compatible. - Dean Michaelis, Complete .50-Caliber Sniper Course : Hard-Target Interdiction (2000) The manual goes on to say that such obstructions may be hard to detect upon visual inspection, and that the obstruction is likely to become dislodged and thus be not be discoverable after a catastrophic failure. It is also known that other obstructions in the bore, such as ice, mud or even moisture, can cause similar increases in barrel pressure.[3]

@ronaldwhitman1377

3 жыл бұрын

@@Magisktification I mean maybe only you and every other boomer feel that way lol

Love how you speak about proper gun maintenance and cleaning. Good advice

May I ask what's up with what looks like a stress mark or scratch paused at 5:07 I wonder if those tabs would be a better secondary safety if they were taller and went further back? And i personally think it was a faulty bullet that led to that catastrophic failure, and is it possible the heavier, longer barrel was warped/drooping as well

@CarolinaGunGuy

3 жыл бұрын

It's just a little scuff. My guns aren't safe queens; I use them as tools, and they get scuffed a bit. 👍

9:03 Iam not just jealous Iam furious. I wish I could have at least 9mm. Greetings from Slovakia 😀

@CarolinaGunGuy

3 жыл бұрын

Hey Matt. Sometimes we Americans take our 2nd Amendment for granted. I'll shoot some 9mm for you next time I'm at the range. 👍😉

@BloPsy__

3 жыл бұрын

Wait, you guys in Slovakia don't have a firearm license? I thought it's kinda the same as in Czechia.

@Mattkanuch

3 жыл бұрын

@@BloPsy__ CZ is after the US the easiest place to get a gun. Here, if you want to own a gun, you can but only as a policeman, security guard, hunter or for sport shooting (you need to prove that you are a member of sport organization or club) And if you want to have a gun for self defense or just for weekend gunrange relax...you REALLY need to prove that you actually need that gun. I asked some guys on gun ranges (ex-policemen and bodyguards) and they told me that exams are really hard. You need to do a test but after that there is committee that is asking questions and its just really hard. Maybe this whole process changed after 10 years...but by judging how government doesn't like its citizens having guns... its maybe even harder now to get the Boom sticks :D At least Czechs are going strong!

@JoaoVictor-nl5gp

3 жыл бұрын

@@Mattkanuch Similar situation here in Brazil. It has gotten a lot easier to buy a gun since 2019 thanks to our president but the purchase process is still really long and bureaucratic and full of restrictions. Concealed carry is almost impossible

A few notes: 1. Excellent video. 2. Sabot rounds with a muzzle break makes things interesting, I fired 30-06 custom made sabot rounds from a rifle with a break and the 10th round blew the break off. That being said, there is an awful lot happening between breach and barrel the moment the powder is ignited so I will wait until the official engineering tests are concluded. I stand on being corrected and expect to be when the professionals find the true fault. 3. Any rifle can fail spectacularly no matter how many redundancies are designed into it. We are human and there will always be in individual bringing a firearm into a scenario that will exceed some unforeseen limitation. 4. Do not blame the weapon from failing when the marksman loads in exotic ammunition, Scott is a professional, even professionals make mistakes. Was Scott reckless? I don't believe so, he was firing rounds for the caliber weapon he had and the warning about slap rounds and mussel breaks was found in a guide to firearms 400 pages plus thick. Scott may have not been informed at this possibility. The point is, don't blame the weapon for the ammunition failing. 5. The RN-50 is a safe weapon which exceeds specification requirements in some areas of its design. (Yes I am very jealous I don't own one, I have fired one though.) 6. Is the RN-50 fragile? That cannon fires a cartridge the size of a banana, you tell me if it can be classified as "fragile". 6. Will I die on this hill defending the weapon and its creator? Yes, yes I will.

@randomidiot8142

3 жыл бұрын

What was the failure point on your example? Did the brake break between ports, shear threads, split the barrel? Just curious. When the 338 lapua was newer there were problems with brakes getting kaboomed, eventually people figured it out and could deliberately load a round with the right propellant to overwhelm the brake and send it flying. People seem to forget that gas has weight and inertia. It wasn't sabots causing those brakes to come off, just gas.

@PrinceAlhorian

3 жыл бұрын

@@randomidiot8142 The sabot began to peel away the moment the round left the barrel. The polymer, still traveling with the bullet at the time, tipped one of the break ports. This caused the sabot to impact the bullet and deviate it just enough off centre to hit the side of the break. The combination of forced sheared off the threads and blew the break in two.

@randomidiot8142

3 жыл бұрын

@@PrinceAlhorian you said 9 rounds went downrange before the 10th destroyed it. How did those perform? Any indications that something bad was about to happen? How large was the bore of the muzzle break?

@PrinceAlhorian

3 жыл бұрын

@@randomidiot8142 These rounds were made buy a trusted gunsmith. They were loaded weighed and measured with particular care and testfired on a bench (different rifle) with a grouping the size of an American quarter at 100 meters (330 feet). The first 9 performed flawlessly and matched the performance of the test batch to a 5fps. Because the first three provided a flawless grouping, no flyers or outliners, it was deemed safe to proceed with the rest. The bore of the break was 1/8th of a millimetre larger than the bore of the barrel to allow pre-expansion before porting the gas to allow some cooling to prevent fowling of the ports. (Custom made break by the same gunsmith.) In the end round number 10 shed the sabot prematurely in the slightly larger bore of the break changing the trajectory of the round, causing impact with the break and thus catastrophic failure. It was only after this incident that we found in some obscure weapons manual dating from the 60's (a massive tome that you would never read for light relaxation) that you never should fire a sabot out of a breaked barrel unless the break was specifically made for sabot rounds (which mine wasn't).

@randomidiot8142

3 жыл бұрын

@@PrinceAlhorian 1/8th of a millimeter.. call it .040" per millimeter, so your brake was only .005" larger than the bullet? Good grief, that's a little tight. The two factory .30 caliber brakes I have are 1mm and 2mm larger than the bullet. I'm not an expert, but I dare say the bore of the brake and the size and shape of the ports would play a role in whether or not sabots and brakes should be mixed. With yours being so tight, makes me wonder if particulates from previous sabots or carbon fouling could have slightly fouled the bore of the brake and closed it off enough to grab that 10th sabot and cause problems.

Hey dude, is that Overmolded grip you stick on your RN-50?

Scott had to put a new (heavy barrel) on his RN-50 to accept SLAP rounds, and one of the rounds STILL blew it up.......I'm just glad Scott made a full recovery and he is still with us 2 years after his accident

IS there a way to add a pressure release system. I also thought it might create a pipe bomb situation.

I have an early m 82 a 1 and have shot a lot that looked like super over pressure stop the finger pointing and get to the bottom of it great vid glad Scot is healing up quick KEEP AZ FREE !!!

@Halfstep2024

3 жыл бұрын

Ok I’ll get to the bottom of it. The gun severely lacks a secondary safety failure system to release pressure in case it does escape between the case and the breech.. period. It’s been standard on pretty much every other high powered rifle to keep incidents like this from happening for decades because you just can’t rely on a physical block (the cap & ears) to be able to handle that amount of pressure and ESPECIALLY with a heavy machine gun barrel this is absurdly true because you’re simply not going to blow that apart which makes both the cap and ears the two weakest links in random events like Scott’s. Know why they are the weakest links? Because nobody cared to properly design a relief port elsewhere in the system behind the cartridge to help dissipate some of the gasses to keep them from becoming the weakest link. So my finger is still pointed pretty hard at the design in the first place until they re do it and put in a proper fail safe to try to keep this from happening again.

Good review!

Best video that I have watches regarding Scott's incident 👌🏼🤲🏼

this is a very good and thorough video. thank you!

I own an Rn-50 here in Australia I have zero concerns about shooting it, I also load my own ammo so I know exactly what’s inside my brass. Looking forward to seeing Mark try to replicate the failure and his observations.

@H-M-78

3 жыл бұрын

What are you using it for? Hunting or just for fun?

@mathewp88

3 жыл бұрын

Just for fun, reloads are $6 each so I don’t go to crazy. Recoils not bad but, nobody wants to sit near me with the shockwave, you really feel it it your sinuses lol.

@hbtm2951

3 жыл бұрын

@@H-M-78 Australia i bet he is hunting freaking giant spiders.

@amorphoussolid8512

3 жыл бұрын

Fellow aussie here. Willing to admit I'm more than a bit envious of you. I'm a gun lover from an anti gun family so my real world experience has been limited. I'm not going to ask you if I could have a go, cause I just hope you're having some fun on behalf of the rest of us! Have a great day and when you get another chance to shoot, Send It!

@mickeydee3595

3 жыл бұрын

@@mathewp88 im also an aussie and went to the range to enjoy my mauser and some bloke rocked up with a 50cal who sat right next to me. He fired his first round and i packed my things and went home 🤣😂 No shit it felt like somebody punched the wind out through my ears/nose

I watched I guess all of the videos about Scott´s RN-50 failing - yours is by far the best. Sorry for my bad english, best regards from Germany. Edit: Keep up the good work. You deserve a lot more subscribers.

@ernestieschevalier3774

3 жыл бұрын

Saboted ammunition and muzzle devices Saboted ammunition use an accelerator (often made of plastic) to propel a much smaller projectile in a large bore. An example of such ammunition is a saboted light armor penetrator (SLAP), like for example the 12.7×99 mm round designated as M962. Muzzle devices, like a flash suppressor, muzzle brake or choke, and with muzzle brakes in particular, can cause material buildup from copper, lead, etc. upon firing. In particular, firing of saboted ammunition in firearms with muzzle devices can leave behind residue in the bore upon firing, which can cause an increase in barrel and chamber pressure in subsequent firing. The Hard-Target Interdiction sniper manual contains the following warning on page 411:[2] Do not fire any style saboted ammunition in a weapon fitted with a muzzle brake, compensator, flash hider or shotgun choke unless you are sure that they are compatible. - Dean Michaelis, Complete .50-Caliber Sniper Course : Hard-Target Interdiction (2000) The manual goes on to say that such obstructions may be hard to detect upon visual inspection, and that the obstruction is likely to become dislodged and thus be not be discoverable after a catastrophic failure. It is also known that other obstructions in the bore, such as ice, mud or even moisture, can cause similar increases in barrel pressure.[3]

@Ekstreman

3 жыл бұрын

@@ernestieschevalier3774 thanks a lot for the detailed insight. Really helpful. Cheers

@antitank99wotboi55

3 жыл бұрын

@@Ekstreman your English is better than my German so 👍

Thanks for the video! I have been searching for information exactly like this, from an actual owner and user of the RN-50.

With a combined barrel and safety stop of around 100,000 pounds, firing a round that generates around 30,000 pounds of pressure seems to be an overdesign issue, yet it still failed. By the time the slap would have reached the muzzlebreak, barrel pressure would have reduced significantly already to well below breach pressure. Whatever happened, happened at the breach

I've love to shoot a 50 bmg some time. But then I remember the ammo is literally 10€ per shot round in germany.

Good design accounts for potential disasters and incorporates safeguards to ensure graceful degradation. Go look at any classic design, like the 1911. The RN-50...any overpressure event powerful enough to strip the threads would clearly blow off the tabs/lugs straight into the shooter's face. I mean, just the idea of securing a gun breech with *threads* is kind of mind-boggling.

@fewwiggle

3 жыл бұрын

Multiple threads are VERY strong. And, if a round is hot enough, any 50 cal gun can kill you. It's kind of a philosophical question on what level of detonation should be survivable.

@a_reptiledysfunction5267

3 жыл бұрын

No 50BMG is “safe” to shoot. If you want safe stick with .22 short and always wear a condom.

@BL-yj2wp

3 жыл бұрын

"I mean, just the idea of securing a gun breech with threads is kind of mind-boggling." Disagree, treads are a common and safe way to close a breach, used in large caliber atillery. However the way Serbu did it here is clearly flawed in that it is not a fail-safe implementation.

@MFurey

3 жыл бұрын

@@BL-yj2wp The artillery breech mechanisms weren't simple short screws, as in the Serbu. And the designers were painfully aware of the hazards, which led to constant design improvements.

@MFurey

3 жыл бұрын

@@a_reptiledysfunction5267 Ever wondered why a .357 cartridge won't chamber in a .38 special?

Thanks for the close up look, the inside of the cap & how the case positions on loading as well as rated loadings on the threads & lugs. Though I am puzzled by the figure of 25000 pounds force on the the threads should the case head separate. I make it that should full chamber pressure (55K psi) come to bare on the inside flat of the cap that that would generate roughly 96k pounds force which is 5k pounds more than the total you mention. (75k threads + 15k lugs).

Nice to see a owner of the gun speaking up and saying a well thought out video. You said it correctly any gun could explode at any time its up to the owner to make sure they check the gun and ammo out before shooting and even then problems still can happen.

in case of an obstacle in the barrel the weakest point of failure is the threads. idealy and logically the weakest point of failure should be on the side of the gun and not on the back towards the shooter

@anonymouslee2083

3 жыл бұрын

EXACTLY! Design a gun to throw parts FORWARD in a kaboom, not BACKWARD!

@a_reptiledysfunction5267

3 жыл бұрын

You’re drunk again, aren’t you.

@Pawn007can

3 жыл бұрын

@@anonymouslee2083 Ideally FORWARD or at least to the side... backward is just silly... I don't know why this is a hard concept for people...

Thank you for all of the information as well as for all of the intelligent and unemotional and factual info. The "caveats" are appreciated. I look forward to your follow-up videos once the gun manufacturer completes his analysis. Just my 2 cents but I think I would rather have a bolt action rifle ... Just saying 😱

Kentucky ballistics brought me here .. Love the support other channels are giving him

You've got a good voice for this and I appreciate the delivery of what you had to say. Thanks for posting this. The naysayers will say what they will without applying logical thought and hopefully they'll find a new shiny to chase soon.

as a mechanic I have seen situations where high carbon steel, and similar alloys, such as tungsten can fatigue when shock force is directed and focused by harmonic wave progression. Supersonic shock energy moving through a medium, like high tensile steel, reaches the end of a conductive element and is reflected by harmonic resonance. Typically only the first few reflected waves would be of any considerable amplitude sufficient to fatigue or fracture the molecular bonds of the steel in areas of the highest surface area, or between two dissimilar bodies that contact with sufficient static pressure to allow propagation of the shock wave from one body to the next. The shock wave is followed closely by subsonic waves generated by the minute deformation of the original body returning to its original shape because of the tensile bonding that was formed during the manufacturing process and subsequent heat treatment. this second wave can be observed with an oscilloscope hooked into a piezo electric pressure sensor. The entire event can and will produce multiple waves of energy moving at both above and at the speed of sound. In certain conditions the supersonic shock wave will be slowed by features of the conductive body as it produces minute reflections that are immediately overpowered by the next wave of energy emmited from the shock source. This in effect causes a decelaration in the following wave and a loss of intensity to the initial shock wave. Features of the conductive body that are under a different tensile load can have unexpected effects on wave propagation. The threads on the end of the barrel, and the threads on the much smaller breach cap may have interacted to allow for a collision between the initial supersonic shock wave, and the sound wave deformation of the tensile ripple behind it. This would make it possible for a poorly charged round that detonated in the chamber to produce the pressures needed to cause the damage that the rifle demonstrated. You said that the breach cap was designed to have a yield strength of 75,000 psi, more than 3 times the expected pressure of a typical slap round. The circular nature of the threads, and the difference of mass between the conducting bodies(that would be the barrel and breach cap) already produce two incriminating factors. The short distance between the source of the detonation location, and reflective features(threads) allows for almost no dissipation(strike two). The initial shock wave would have caused tympanic resonation with the shock wave reaching the center of the breach cap face causing tensile ripple to be reflected with amplified force(steeerrriiiike 3). With multiple waves arriving in progression, and the amplification of force generated by the breach cap, it is not only possible but highly likely that the detonation of the slap round and supersonic shockwave produced reached the end of the barrel nd caused tympanic resonance, reflecting only a portion of its energy. With each subsequent wave arriving to collide with the previous wave, a harmonic vibration of the breach cap was generated. This vibration was amplified by both the low mass of the cap, the interaction of sound propagation with the threads and static pressures they produced. With the threads becoming the focal point of the resonating energy, and the area where the shock wave energy was colliding with the resonation, along with the static pressure already being exerted on the threads, fatigue followed by zipper fracture of the threads on the barrel allowed the breach cap to rip the threads off while the projectile was still traveling down the barrel. the projectile, and breach cap left the barrel with similar force. The body of the rifle had been designed in such a way that cap failure was anticipated, and the ears that prevented latching to occur if not fully threaded on in this case prevented this breach detonation from being fatal. I dont think there is any chance that a normal round would have been able to generate the energy needed to cause this type of failure because in a normal round the powder deflagrates,(burns without the flame front breaking the speed of sound). In this case i think there was a detonation in the powder charge.( partial ignition wich produced multiple flame fronts that collided causing explosion rather than a rapid burn) Sorry for the lengthy comment, i hope i was able to present my theory such that it might help provide an answer. Those were some mean threads on that barrel, and it would have taken immense pressure to do that!

@toddwhite3217

3 жыл бұрын

Plus the simple fact that threads wear over usage/round count... and the heat treat could have been off... not a gun for me.

@JJFX-

2 жыл бұрын

Amazing reply that should have had more attention. I wish I was knowledgeable enough to fully grasp it but I think your theory makes a lot of sense when you factor in metal fatigue over time. While I don't think this is the fault of Mark Serbu, this gun should get redesigned going forward, period. Redesigning a rare but potential weak point is what manufacturers do all the time. I do not think it would be difficult to strengthen the ears and possibly the thread design. This would not automatically mean he's accepting fault. At the very least it would make potential buyers a lot more comfortable.

@traviscapehart7590

2 жыл бұрын

@@JJFX- I would be extremely disappointed if the rifle is not redesigned, or at least modified to eliminate the possibility of potentially fatal failures regardless of the cost to implement those changes. Quite simple modifications to strengthen the area directly behind the cap, having a cap that has more mass, larger deeper, and thicker threads, a simple roll and lock breach cover that provides external support for the cap much like the body of older breach loaded rifles where the majority of stress is absorbed by the hinge mechanism being in contact, and locked under pressure, would completely eliminate wave propagation and add to heat resistance making for a much beefier breach without adding more than maybe 22 oz of actual weight making for long life, heat dispursion, and most importantly enough strength on that cap and behind it to deal with breach detonation or faulty round anomolies

@JJFX-

2 жыл бұрын

@@traviscapehart7590 Agreed. As a designer I can't comment on the engineering challenges but what typically holds true in my experience is the product of great engineering often designs itself. From my perspective, those ears seem out of place and the entire section of the rifle feels unbalanced. It's not difficult to imagine what the next revision of this rifle should look like.

I think it Might be a good idea to Extend those "Ears" all the way to the Stock to Help Prevent a Total Shear off.

@jackwalsh5270

3 жыл бұрын

Thought the exact same thing! Less machining required, and a little more gun weight but should be negligible to a 20 lb gun

@toomanyaccounts

3 жыл бұрын

@@jackwalsh5270 which wouldn't do jack shit when you have for all intents a pipe bomb go off.

@--_DJ_--

3 жыл бұрын

@@toomanyaccounts It might stop them from becoming projectiles if nothing else.

@toomanyaccounts

3 жыл бұрын

@@--_DJ_-- it would not. once again ma dueces and barrets have blown up by these counterfeit rounds.

@--_DJ_--

3 жыл бұрын

@@toomanyaccounts I don't know what makes you so sure about that. They would obviously still be damaged by something like what happened but they might not come off in such a dramatic way.

Thanks for showing the details.

Not a death wish, but a strong desire to validate your ownership and use of one of these. While your opinions are based on experience with one of these, it is not valid with respect to either safety or the mode of failure. A very comprehensive forensic evaluation is necessary. Your comment that failure of one of these will likely cause more damage than a bolt action is enough not to use one, especially as the impact would not be slight but would be catastrophic to the shooter. Life is about risk management.

The issue isn’t the tolerances and capabilities of the gun when it comes from the factory, it’s the capabilities after 50 rounds, 500 rounds, 5000 rounds. What pressure can the gun withstand as it ages? Did firing those rounds basically mimic how a gun will react 15 years and thousands of rounds later.? Because the nature of the gun and the cost of .50 cal ammo, most of these guns may never get hundreds, let alone, thousands of rounds fired. We’ve all cross threaded a nut before and the “secondary” safety feature doesn’t seem effective. Basically when this gun fails, you’re looking at the most likely result.

Thank you 😊 for doing this video... where "most" of the vids out there are objective there is one in particular that was really bad (crs). People do not understand what it takes for a failure like this or know much about the 50 bmg round itself... again thanks for making an objective video.

@sladesmith5651

3 жыл бұрын

@ETHRON1...did you see mark serbus latest video on the RN-50?....he showed a email from his engineer friend... In which the engineer stated to make the threads sheer like that, without the brass failing..160,000+ psi chamber pressure...but if the brass were to fail, and let gas out...35,000 psi chamber pressure...i bet the brass failed...I think if the pressure had truly been 160,000+PSI...the breach cap would have taken the Scott's head off.

@ETHRON1

3 жыл бұрын

@@sladesmith5651 yes I did...actually saw it before yours...again thanks.

@zacharyrollick6169

3 жыл бұрын

I had to unsubcribe over that one. If it wasn't outright slander against Serbu, it bordered on it.

Thank you so much for your help your opinion is greatly appreciated and important thanks so much

Thank you.

I have one on order. I haven't, nor will I change my mind on owning or shooting one. As you said, a lot of non-Serbo owners are spouting off on a rifle that they know little about. Just trying to get some KZread exposure.

@johnhodges8264

3 жыл бұрын

Have you seen the dude thar helped design it?

Imagine if he wasn’t wearing safety glasses

I'm going to through in my two cents worth in. I am a retired US Army Chief Warrant Officer Three, (CW3). I have been around many .50 BMG Caliber weapons like the M2, M85 and sub caliber devices that are designed to fire .50 BMG rounds through Main Guns on tanks for training purposes. The ones that I am more familiar with were bolt action. Sometime in 2004 I got into a conversation with a manufacturer concerning S.L.A.P. Rounds that were acting irregularly. His complaint was that the rounds being fired through the barrel of his sub caliber training device were all over the target and not grouping like they should. He was not having any trouble with Ball or AP rounds just the S.L,.A.P rounds. Watching the footage of the S.L.A.P. rounds reminded me of this conversation. I also heard through my sources at APG's Ordnance Center & School that the troops in the field were also experiencing lack of accuracy. I did not hear of any BMG's failing catastrophically. I believe that the problem is in the SLAP round and not the gun.

Will be interesting to see if there is any redesign of the rifle following this incident. I was wondering whether making the hinge pin weaker (ie deliberately frangible), and the ears in the receiver taller and much much stronger might be one useful modification - intent being to make the path of least resistance be the barrel flying forwards and preventing the cap from flying backwards.

20 years in engineering high pressure systems. I feel that while the dubious SLAP round is most certainly the culprit in Scott's accident, putting all the blame on the round diverts everyone's attention from the fact that the RN-50's design doesn't have a safe way to fail. An in battery detonation can be easily induced through a bore obstruction by having even a little debris in the barrel, or a squib round, or any number of means, and the gun should fail by diverting the energy away from the user, not directly at them. Claiming the RN-50 is totally safe as long as nothing goes wrong is like claiming that a 1950s sedan with no seat belts or crumple zones is safe as long as you don't crash into anything.

A simple modification is to have the "ears" be a solid piece going all the way back and not have that drop behind them. This will make it harder to set the hammer, and may make it easier to slip when setting the hammer causing an accidental discharge. So who knows what would be the best option

@TheMrPeteChannel

3 жыл бұрын

Or give the twist breach something like a lock on a howitzer. I know this will be make it bulkier.

@Aetius_of_Astora

3 жыл бұрын

Could always have only 1 of the ears go all the way back while the other has the drop to make setting the hammer safe and easy. Having one reinforcement is better than none, and if one ear fails the second would help deflect the cap away from the shooter.

Shooting mystery ammunition is a fancy way to play Russian roulette.

Well, his Serbu did have a different barrel and the chamber was altered .... But even if the cap wasn't on all the way the hammer is large and I don't have one of these nor experience with it so could the trigger still be pulled and the hammer still strike the pin and fire or no ? .... And if those threads were already damaged from the previous rounds then it wouldn't matter if it was on all the way or not in a sense no ? ....

I wonder if those ears were just a full frame with no cut outs, if they would have banana peeled instead of shearing off.

@billyaitken1713

3 жыл бұрын

😉👍 I thought it was just going to be me looking at the cutaways either side to form the 'ears' . Weight saving,but possibly stronger if it were just left being 'slab-sided'🤔

I dont know mark but he seems to have good character and I believe he will be truthful

@BloPsy__

3 жыл бұрын

Yeah, I am not so sure about this anymore. In his last video with the letter from the Ukrainian engineer, he completely skipped the part where the engineer is talking about the cap failing at 36k PSI if there is a gas leak past the primer. Did he skipped it unintentionally, or he just didn't want to talk about it since the 161k PSI number is much more impressive? Who knows.

@petermuller3995

3 жыл бұрын

@@BloPsy__ lol

@MobiuSphere

3 жыл бұрын

Honestly, it's in his best interest to be truthful. From a legal point of view if he lies about it, or refuses to issue a recall if the product is truly unsafe, it opens him up to a world of hurt

@petermuller3995

3 жыл бұрын

@@MobiuSphere XDDDDDDD

@nom6758

3 жыл бұрын

is what your grandma said before she bought a door for $4.5k due to "Mark the Door salesman's" upstanding character.

I noticed that the 2 secondary safety arms separated from the breach cap from everything flexing upon firing. that could of been the reason the cap had enough momentum to sheer them off. Just something to think about

No one has talked about the round that was fired just before the last slap round. No one seams concerned that it didn't have enough energy to blow through the soft metal hydrant. It got stuck in the back side. And it didn't appear deformed. Could there have been a partial obstruction at that point?

@toomanyaccounts

3 жыл бұрын

they were just counterfeit slap rounds he was firing. the last just was chock full of magnum powder

It will be interesting to find out the cause.

@Jc-qu9hr

3 жыл бұрын

The cause was a sketchy ass slap round

I'd like to think that the firearms community is not the "cancel Serbu b/c failure," crowd and is willing to wait for fact-based data to be released before grabbing their pitchforks. I hope I'm right.

@hamletksquid2702

3 жыл бұрын

There seem to be a few, but most folks seem to be waiting to see. I know I've learned things from this incident that wouldn't have occurred to me otherwise.

@christopherjones3205

3 жыл бұрын

I don't know I just loaded my pitchfork. JK.

at 8:20 i see some thing odd that made me think of how a breach load shot gun has that may help the 2nd safety tabs

I would like to know what guaging system they use to check the threads on the cap. Even mil spec gauging allows two undersized threads on the lead in. Four rotations to bottomed out means that half the threads could not be optimally engaged! And yes I did work as an inspector in a machine shop that made milspec parts!

My armchair engineering change would be to those safety "ears." Basically just turn them around so the front is sloped in a way that deflects a failing breech cap up and over the head. Hopefully, if the force has somewhere else to go (up) it wont shear the ears off and send them flying away as shrapnel.

@rayrocha4189

3 жыл бұрын

I think I would ,on a right hand gun, change the ear to run its height all the way to the stock, use 1018, which will deform instead of break. That should do the same thing as you suggested. It won’t capture the cap. But it would deflect it. Also I think it would shear the action break hinge pin instead of allowing the breech cap to gain any velocity. I suspect it would push the stock back hard enough to break the bones in the shoulder area.

I respectfully disagree about it being safe. A good design, especially with such high-powered ammunition, would be to have a kaboom, if God forbid it happens, send the bulk of the shrapnel in the direction of the muzzle, not in the general direction of the person wielding the gun. have the parts that will give first be downrange of the wielder.

@mechanicallydisadvantaged1297

3 жыл бұрын

dumb take. like respectfully disagreeing that a car is unsafe because it wouldn't protect you if slammed into a wall at 120mph...

@theoriginalmikaveli

3 жыл бұрын

@@mechanicallydisadvantaged1297 so do your cars have the crumple zones inside the passenger compartment then, as at 120 it makes no difference? 🤷‍♂️ ...or do you expect the car to at least absorb crash energy in safer places.

@mechanicallydisadvantaged1297

3 жыл бұрын

@@theoriginalmikaveli the rn-50 has safety features, but just like a car-- when you're far far beyond what its designed (or any firearm is designed) for all bets are off.

Never understood why the 2 pins behind the cap are so short why not make them the lenght of the receiver?

I literally ordered mine after watching Scott’s video. That’s how much confidence I have in Marks work. Now that being said. I still have not received my rifle yet because they told me it was an 18 month back log and I’m right around 13 months right now so I should be getting it within the next few months and I will be doing a video of it on my very not famous KZread channel.

i think what should be taken away from scotts incident is this is a good gun, but it could be better and it stands to be seen if mark serbu is going to make any changes to it. in my arm chare two things i would add or well modify on it, some sort of gas port, i believe in a previous video mark serbu mentioned he didnt add one more or less because it was extra work that would need to be done, idk if the video is still up but he uploaded it about 5 months ago and the comments are currently turned off, hes talking about the gun with royal nonesuch. also change the ears out for something more fail safe, even if you just continue the ears back, yes it would make cocking more difficult but you could easily modify the hammer to accommodate that. again this is just my opinion on the topic.

@toomanyaccounts

3 жыл бұрын

how could it be better. the counterfeit round blow up more then three times the pressure of a .50 bmg round. no gun could survive that.

@houghwhite411

3 жыл бұрын

More thread count could help, but it will make the gun became less practical to use. Mark must be thinking about all the possible additional safety measures right now

@toomanyaccounts

3 жыл бұрын

@@houghwhite411 no additional thread would with a pipe bomb going off inside a steel tube

@grndzro777

3 жыл бұрын

@@toomanyaccounts The gun might not but that cap would have been stopped, and that brake probably wouldn't have nearly killed him from being sheared off.

@toomanyaccounts

3 жыл бұрын

@@grndzro777 the enginner said to mark serbu that vent holes would not save the rifle from a cartridge that detonated.

I can say for certainty nobody has lost more sleep over this than Mark Serbu

@houghwhite411

3 жыл бұрын

I can see in Mark Serbu's eyes. He does care more than those keyboard warriors

@RARufus

3 жыл бұрын

For sure. I can only imagine how bad he feels and thinking about what he should have done or could have done differently. Really, Scott is incredibly lucky to be alive.

@danielweber3433

3 жыл бұрын

So why are the guns still for sale? A safety factor less than 2 is quite dangerous. Nobody with an engineering background will shoot this gun ever again, hearing about the pressure numbers mentioned in Scott's original video.

@Jeremiah90526

3 жыл бұрын

@@danielweber3433 Safety factor of 3+. Serbu himself got that number wrong, and has a video update (check out his channel). It wasn't a minimum for of 85 KSI, it was a minimum of 161 KSI (if you don't know what KSI is, I am going to call BS on you speaking for Engineers). Dude was under pressure and did basic math wrong.

@danielweber3433

3 жыл бұрын

@@Jeremiah90526 I will check the update. I don't know why you asume that I wouldn't know what KSI is. Even if I didn't, I could just google it. I bet many engineers never heard of KSI because they use the metric system. It looks a bit shady that there are two videos that speak of a low safety factor and later on there is another one that has a increased number. I still wouldn't shoot that gun after seeing Scott's video. To me my life has more value than being able to shoot 50s out of a cheap gun. There are plenty of other options.

I've seen pictures, over the years, of handguns that have failed, some blowing up. I'm wondering if anyone knows more about the topic of gun failure in general. I dabbled with reloading handgun ammo years ago and carefully followed all the guidlines. Scott's accident concerns me about these kinds of safety issues in all guns.

Is there any reason why the ears could not be longer and why there isn't some kind of fail-safe to physically contain and prevent the end cap from shooting in the persons eye ?

@domaxltv

3 жыл бұрын

there is, its called making the gun as cheap as possible... they could have used a stronger thread, bigger ears and perhaps some sort of deflective shielding incase both those fail, however those would probably be slightly harder to manufacture, and in the world of making a gun as cheap as possible, which, admit it, the RN-50 is literally an oversized pipe gun, I can throw something with teh same operating mechanism together in my garage, you have to make sacrifices and hope that they dont come back to bite you in the ass... and I mean even more expensive guns sometimes end up cutting corners or not properly testing, and they still end up blowing up and sending the bolt back into the shooters face, its a design flaw or something was overlooked, anyone with a sane head would look at this whole thing and just give the gun the necessary upgrades instead of just blaming the ammo vendor for everything... quite likely that if this was fired out of a proper bolt action sniper rifle, the locking lugs would have sheared off, sent the bolt flying back to teh point where secondary measures stopped it and the gas would have vented out to the side through the hole left by the now thrust back bolt... atleast thats what would happen on something like a traditional military bolt action, im not too familiar with civilian offerings

@BIKEMAN21

3 жыл бұрын

@@domaxltv Thanks for the insight. After seeing the gun fail i wouldn't be using it, just goes to show to do proper research on how safe a certain gun is before buying it.

I've shot one before on a range and yes im jealous i don't own one of these, it's overall a good gun with simple to understand parts for maintenance. it's a 50 cal easy to understand gun is why im jealous i don't own one.

To me as a machinist... Yes the gun is "safe" in a sense. But in the event of a catastrophic failure everything that will fail is pointed back at the shooters face with nothing in between but safety googles. Also having those ears designed like that is just asking for trouble. When working with pressures that high you should have redundancy in safety measures. Yes the gun may be "safe" but the 1 time in a million that it fails will have an almost quadruple fatality rate of any other gun in it's category. I've seen people blow up 50 cal muzzle loaders by accident and instead of blowing shrapnel back at the shooter the barrel pops like a balloon and sends bits flying out perpendicular from the shooter leaving them relatively unharmed. It was a bad round that caused that failure so it wasn't the guns fault... But when it did fail it directed everything right back at him which is unacceptable from an engineer standpoint. Just my 2 cents

@ShellShock794

Жыл бұрын

Mark mentioned diminishing returns in one of his videos and I gotta say, I agree with him. Sure, he could completely overhaul all of his guns; re-engineer them to be safe to use with ammo that is 6,000 times more powerful than even that one SLAP round but all of that work, time and money spent because why? Because one single person has used tampered-with ammo in the 20 years that Serbu has been making guns? The gun is already safe to fire (Not just fail-safe. *Safe to fire* ) rounds all the way up to over 3 times the safe pressure rating for 50BMG. It is unreasonable to expect a round as powerful as Scott's SLAP round which was roughly 8 times more powerful than the safe operating pressure of a 50BMG cartridge. That ammo was tampered with and fully intended to grenade a firearm and harm or kill the shooter. Like this video said; don't buy sketchy ammo from sketchy websites and you have literally nothing to worry about.

Is there a Serbu 50 cal version with bolt action and magazine but not semi auto? I don't know what it's called. I know there is a single shot with bolt.

@a_reptiledysfunction5267

3 жыл бұрын

No.

Had to come back and make sure I gave my man a like for the top tier video

If the breech cap fails at 75,000 lbs then the “ears” are zero of a safety feature if they fail at 15,000. Sounds like you also came to the same conclusion as me. Yes the gun is safe... but no... it’s absolutely the worst gun in the extremely rare case of a catastrophic failure.

@ernestieschevalier3774

3 жыл бұрын

Saboted ammunition and muzzle devices Saboted ammunition use an accelerator (often made of plastic) to propel a much smaller projectile in a large bore. An example of such ammunition is a saboted light armor penetrator (SLAP), like for example the 12.7×99 mm round designated as M962. Muzzle devices, like a flash suppressor, muzzle brake or choke, and with muzzle brakes in particular, can cause material buildup from copper, lead, etc. upon firing. In particular, firing of saboted ammunition in firearms with muzzle devices can leave behind residue in the bore upon firing, which can cause an increase in barrel and chamber pressure in subsequent firing. The Hard-Target Interdiction sniper manual contains the following warning on page 411:[2] Do not fire any style saboted ammunition in a weapon fitted with a muzzle brake, compensator, flash hider or shotgun choke unless you are sure that they are compatible. - Dean Michaelis, Complete .50-Caliber Sniper Course : Hard-Target Interdiction (2000) The manual goes on to say that such obstructions may be hard to detect upon visual inspection, and that the obstruction is likely to become dislodged and thus be not be discoverable after a catastrophic failure. It is also known that other obstructions in the bore, such as ice, mud or even moisture, can cause similar increases in barrel pressure.[3]

@StarSwarm.

3 жыл бұрын

@@ernestieschevalier3774 Yeah that’s already been ruled out 100% bud. That can’t cause a breech detonation.

@KC-rd3gw

3 жыл бұрын

Serbu had an engineer crunch the numbers and it had to be 162 000 psi or above for it to fail. Well above anything you would normally see

@toomanyaccounts

3 жыл бұрын

@@KC-rd3gw gas would have to leak into the cap to cause failure at lower psi but that is impossible under normal circumstances. no vent holes would save the gun under a detonation either.

@c0ldyloxproductions324

3 жыл бұрын

@@StarSwarm. it’s not ruled out especially since the slap rounds, which are really old because they are no longer, we’re aged and aged gunpowder is extremely volatile, ever hear about sweating dynamite? Ya very dangerous and more explosive then normal it is very likely that’s what was wrong with the slap round

But why did Serbu ''cut'' the ''ears''? Wouldn't be better if instead of each ''ear'' there was just a long piece of metal going all the way to the buttstock ?

@CarolinaGunGuy

3 жыл бұрын

It's probably to make it easier to engage the hammer. Since you have to do it manually, having higher walls on the frame would make it more difficult.

@debo2128

3 жыл бұрын

@@CarolinaGunGuy Yes I understood that. But the gun may be safer without ''cutting'' them. Maybe... I don't know...

I wonder what has a higher pressure tolerance before failure, the RN-50 with its threaded cap + double emergency lugs, or a single shot bolt action .50 BMG.

i have a serbu rn-50 for three years now and shoot it on a regular basis , i used modern american eagle ammo in her ''fury'' and have never had a problem with feeding nor with shooting of this gun , i found that this rifle requests a lot of respect due to it's large caliber , as a user of these rifle for target and hunting found it to be very safe and reliable as professional LT.FIREFIGHTER-PARAMEDIC , FLIGHT-TRAUMA-E.R. NURSE i would not buy nor use any weapon that would cause harm to me nor my wife MCSO DEPUTY becky nor any other friends nor range personal , i highly recommed that you use good common sense , proper safety equipment ie , safety glasses, gloves and protective clothing long sleeves and pants/boots

@benjaminbagley2198

3 жыл бұрын

@timmybmn ''NO'' i shoot only civilian made ammo like american eagle brand , i also collect wwii guns converted to 7.62x51 nato from 8mm or 303 brit or 7.5 french , these guns have limits too placed by the rebore and age of the weapons , like all weapons i had in the past i only threw away one full ammo can of reloaded 223 for my colt ar-15 ''sp-1'' which it misfired multi times and a bullet was stuck in the barrel , so even good guns can get bad ammo , i also learned a lesson that day , only use reliable ammo and wear protected safety gear when shooting thank you