Quite possibly the most informative video I have seen yet regarding how to properly build a functioning 9mm AR. I can't thank you enough for taking the time to fully describe all the parts you used. I am currently building my first AR9, and needed this exact video! Thanks so much, young man. Keep the GREAT videos coming!

@joshv06

4 жыл бұрын

Thank you man, I got a new video coming where I'm modifying a CMMG RDB to fit into an EP9

@devinsmith2717

4 жыл бұрын

I agree, currently working the kinks out on mine. Went with a blitzkrieg hydro. Buffer and a regular old .223 spring and i have a feeling now that it may be the wrong setup after watch this. Great video!

@franksimon8375

3 жыл бұрын

I'd rather govt subsidize actual good educators like this gentleman than the trash we have "teaching" in schools.

It's an excellent video, my ar9 it is like yours, only I have the sidecharger model. I experienced the same problems: 1 the fake "gas key" separeted, easy fix: clean the screws and apply loctite treadlocker. 2 at about 3000 rounds, the original firing pin, snapped in two parts and the head had a mushroom deformation, clear sign of bad heat treatment and probably also bad material. Now I have a better quality firing pin, always with its spring for safety. 3 the bolt had a sharp corner that caused unusual wear on one feed lip of the ETS mags. It needed a little bit of filing. But in general the bolt with the 223 extractor is excellent, way better than the old ar9 projects. 4 some sharp corners around the charging handle needed sanding. 5 the sidecharger handle required tuning, sometimes it didn't stay closed at the last round, the retention detent it's not a great solution, especcially with wear. But the sidecharger is really handy in competitions, also the working bolt release on last round. I really like mine, it is extremely reliable and with the awesome ergonomics of the AR platform, even with the minimal tuning I think that it is way superior to many other SMGs/9mm carbines, that also have their problems. Again great video👍

I've now run black Creek and qc10 Colt lowers with ballastsic advantage and CMMG barrels respectively. Feeds all FMJs and Federal HSTs with zero issues.

@thebardock6785

5 жыл бұрын

Did you run anything before that? I was thinking of getting a block for s&w mags

Adding quarters to a standard AR carbine buffer spring stiffens it up to make it stiffer like a dedicated 9mm buffer spring (I've been told). Dedicated 9mm buffers are heavier than standard .223/.556. It seems counter productive to weaken the spring and than add quarters (?)

@TheCivilWarriorProj

2 жыл бұрын

The quarters ensure the BCG doesn't slam into the rear of the receiver. They provide stand-off if you will.

Such an awesome video man. Love how you explain stuff. I built my AR9 already and functions but the explanations you give helped shed light on a lot of things I was confused about. Also saw your other vids. Your tech background explains your detail oriented nature. Good stuff man!

@joshv06

Жыл бұрын

Thanks man, I really appreciate it! I've been needing to find time to make more videos, but been busy running the business!

Great video my AR 9 works flawlessly now after watching your video. 👍

@joshv06

2 жыл бұрын

Great to hear, brother!

This is one of my fav goto videos when I did my first ar9 build. Great info. Been subscribed to your channel for a while now....looking forward to some new videos on the ar9 or other ar pistol builds or parts reviews. Thx

@joshv06

4 жыл бұрын

Thanks man. I plan on doing more once the cold weather goes away!

@300whiteout9

4 жыл бұрын

This is my second time here lol

I ran NFA receiver set. Super sloppy fit but it worked. I ran Foxtrot Mike Products FM9 bolt which I milled to clear the barrel feed ramp, the taccom 3g pcc buffer system and their 5.25” ramped barrel. I had to modify the length of the buffer and run a flat wire spring to work with the LRBHO more reliably...however it fed anything reliably. Ball ammo, flat nose, my defense round was federal 147gr hst. Never had an issue with feeding, extraction, or LRBHO. I sold that 9mm pcc a few years ago because I hated the fitment of the NFA receivers.

Very useful vid, particularly the comment about weaker buffer spring.

@joshv06

4 жыл бұрын

Thanks man. It helped a lot with preventing nose dives on bullets

great tips on ar9 reliability. just ran 3 quarters w/carbine buffer and nfa buffer spacer worked very well. only 2 ftf w/ets mag stock glock 33 rounder was 100% reliable

@joshv06

6 жыл бұрын

ETS mags have a lot of drag in their mags. Glock mags have a steel inner lining and feed up quicker which give less feed issues.

@frankv3424

5 жыл бұрын

Just finished build had a few problems, had a few hang ups and buffer spring pin snapped twice on me any ideas why ?

I generally would prefer building the gun, but my EP9 is the best value AR-9 I could get for the price. It's a fantastic pistol.

"... But JHP doesn't feed properly... But watch, it will work perfectly on video...". Murphy's law hard at work. Good video, my dude.

@joshv06

5 жыл бұрын

For sure. Murphy's law will get you when you need it most. Which is why I use my roni as my defensive subgun with gold dots.

@theMelvster6

3 жыл бұрын

Use a ramped barrel like the taccom 3g ramped barrel and it’ll feed JHP without issue

Awesome video man. Great info. I'm just starting my ar9 build. Blade and tube kit, PSA PA-X9, and ambi SS is what I've got so far.

Yeah bolt velocity is critical for proper function with these blowback function systems My BCA ar9 upper feeds perfect by hand with endomags but only runs 115s with a 12oz bolt and 8oz buffer, gonna try a 11oz buffer and see what spring works best , won't run 124s stovepipes every other round seems like

Nice ar9 my setup is Angstadt jack 9 reciever set QC10 3.5” barrel SLR 4.75” rail TAccom extreme BCG Spikes 7.7Oz buffer weight Spikes buffer spring SBPDW brace BCM enhanced LPK Magpul pro flip ups Sig Romeo 5

I had the same problem with the nose going downward. Taccom3g has a stainless steel deflector that redirects those nose down feed problems up into the chamber, both round nose and hollow points. you have to file some upper receiver next to the barrel face. I used an ignition point file from oreilly's. Just follow the instructions they send with the defector. They say to friction fit or glue it in place, I chose to keep it barely loose so I can thoroughly clean the upper. If I were to take the upper and lower apart it would fall out.

@joshv06

6 жыл бұрын

I have since put the Taccom feed ramp on and it works fine now.

Good job. Very informative! I love learning about ar9s

I'm testing my ar9 today for the first time. Gonna try the Endo mag conversion kit first. I think I will throw a couple quarters in my buffer tube as well. I wish I would've wore my standard spring out before now

@j1ivibo

4 жыл бұрын

Howd the testing go? I tested mine with endomags a few days ago and today. Was having ftf but started working. Still jams up here and there. Waiting for my heavy buffer to test it out. Hopefully itll feed well

@l337l0gan

4 жыл бұрын

@@j1ivibo I had issues ejecting. It fed, fired, and extracted fine but 50% of the time the ejection would just fumble around in the chamber. I purchased a magwell conversion block and haven't had as many issues now. I may have 1 failure every 100 rounds now. But the Endo mags I was having 1 issue every 2-3 rounds

@j1ivibo

4 жыл бұрын

@@l337l0gan damn. Mines the opposite. It fired and ejected fine. Just chambering was the issue. Which mag block did you go with?

@l337l0gan

4 жыл бұрын

@@j1ivibo I bought a promag. It's a cheaper one. Cost me like $45 or something. Colt smg style mags. It's been good and LRBHO has been working fine. My metal mags work great but some of the poly mags I had to take a Dremel and some sandpaper to the lips just a tad before it would seat on a closed bolt

9:17 Your feed issue is due to the stiction between the steel cases and your magazine, not because of the type of bullet you are using. Steel is just not as slick as brass, and plastic grips it more. You can see the round pivoting on the front of the feed lips of the magazine - the round is pointed at the barrel extension before it ever gets to the feed ramp.

@izyb6608

2 жыл бұрын

Don't hear "stiction" much outside of motorcycle tech... :-D

@FUBARguy107

2 жыл бұрын

Aero has acknowledged that it doesn't matter what ammo brand you use, hollowpoints suck at feeding in AR platforms. The "feed ramp" isn't really a feed ramp at all.

@tylerlegg3069

Жыл бұрын

I'd have to disagree. I've never put steel through mine and it jams all the damn time. Hollow point or not, doesn't matter. After a little bit of carbon build up gets o0n the back of the barrel it's game over as far as feeding goes. Never buy angstadt arms. This was happening with there UDP-9. Zero customer support. wasted $1,400 on a POS that jams after 200 rounds.

taccom extreme feed 9mm barrel. it will change your life.

@kingsofglamis9576

4 жыл бұрын

skippythefreak91 were did you find that barrel

Last time I watched one of your videos I built a 7.62x39AR. I am now thinking that I may need a 9mm AR. Thanks. By the way that skidtactical 7.62x39 ar bcg is outstanding.

@rloco6628

6 жыл бұрын

KyFirearmsChannel What spring would you recommend for a AR-45?

Good info, thanks for sharing

Ar 15 9mm need a 8 to 9 Oz buffer and a reduced power carbine buffer Spring. The buffer spring is only pushing a 9mm into battery.

Very good information. Thank you. Subscribed. 👍

The Winchester Silvertip is a hollow point that is narrow at the tip

Nice tip with the quarters

Spinta makes a great Glock 9mm bolt carrier group!

Great video. I am going to get a KAK buffer. I have a full auto colt. Getting bolt Bounce. I have a solid buffer.

Thank you, Broski

I’m building another and this is great info exactly what I’m looking for!! Thanks brother!!! AND, I’m going with the Faxon barrel as I’ve heard all good thIngs and Davidsons has them on sale and it’s 10-15-22 for anyone shopping!!!

Finally someone else that not only knows about putting in a quarter or two but actually admits it. Tell some guys about it and get nothing but a blank stare back.

@lazerrred

5 жыл бұрын

LOL....... I know what you mean, like - duh.? Some don’t know that certain timing can make it happen or not on any mechanical device.

@WVdavidB

5 жыл бұрын

I didn't know till I saw it here! Lol. I kept thinking people were meaning something about quarter circle ten. I'm about to build me a YHM new billet block lower/9mm upper AR.

@mousetoad7040

5 жыл бұрын

Putting quarters in is to stiffen up a standard carbine spring as 9mm springs are stiffer than standard AR carbine springs I am told. Weakening the spring and then adding quarters is contradictory from what I understand. Am I wrong?

Some Glock compatible bolts don't work with Colt style mags/lowers. And compressing a spring doesn't weaken it contrary to what so many claim.

thank you for sharing your experience

@joshv06

6 жыл бұрын

Sure thing, man!

Taccom aftermarket ar9/ar45 feed ramps for $20 fix the hollowpoint (or any) feeding issue. They work great in my ar9/ar45! chk it out

@JenkinsStevenD

5 жыл бұрын

Unfortunately those seem to interfere with the dedicated 9mm lowers that have a built in LRBHO. Additionally, I don't believe they help if the cartridge is feeding too high which I guess is incredibly uncommon. Good recommendation for those without the LRBHO though!

Nice job you will only get better .

I learned a lot from this video.

Lapping the upper receiver and touching up the feed ramps with a Dremel will fix your problem with the hollow points.

@joshv06

4 жыл бұрын

Not really since glocks feed down the middle.

Great video! I was runners Ng a standard 9mm pistol spring, 6.4oz 9mm pistol buffer & had some ammo tips getting crushed back into their casing. Called FM Products & they said a lighter 308 spring as long with the same buffer weight will resolve my issue. I'll keep ya posted...

@jesusguapo8684

4 жыл бұрын

How it go? I am having that problem rn

Nice build. I have the same buffer set up, and lower. Change out the stock mag release for the odin works model. Its works perfectly. Much better than the stock one.

@joshv06

6 жыл бұрын

Thanks. My build works perfect. I love it. I need to reload more subsonics for it.

Thanks for the info! I have the Davidson Defense 9mm Conversion system on the way, and I will be trying it out on a Polymer 80%'er I just machined. Total test bed deal, but should be fun to learn the 9mm AR game. Have fun, G.

@joshv06

6 жыл бұрын

Nice! Best of luck!

Thanks for the tips sir

Good vid. Doing a dedicated 9 now. Probably going to try the macon armory buffer and barrel

Well done sir, thanks for the info!

@joshv06

6 жыл бұрын

Sure thing, have a great day!

5 star video

Fantastic video

Cash is king

Best barrels are macon armory, he will also do your barrel if u don want to buy one

What would cause the firing pin to have soft strike on primer, firing pin moves freely and it will protrude when I remove spring from firing pin.

great info thanks

Wow, I didn't expect a 10oz buffer would work behind a NFA bolt with standard power factor 9mm, that puts things in perceptive how much mass a blowback action should have. Looks like I will be needing to track down the heaviest buffer made for use with the upcoming 357 sig build for up to and over 200PF, probably the extra power or flat wire spring as well. My wallet already hurts. Thanks for the heads up on NFA firing pins too

@joshv06

6 жыл бұрын

Yep! They need a lot of weight to delay the blowback. For sure get the KAK buffer!

@MinimalistMotoLife

6 жыл бұрын

@@joshv06 I was shopping around and the Stern Defense bolt comes in at 1.2oz heavier than the NFA bolt at the same price point, or 1.0oz lighter without the removable weight. Sounds like just the ticket for my build and might be something you would be interested in on future 9mm builds.

Built an ar9 and the rounds either get fed right into the bottom of the barrel crashing into the mag well basically, or it feeds but the round gets dented and pushed in sideways

@joshv06

4 жыл бұрын

What buffer, spring, barrel, mags are you using?

@austinporter9232

4 жыл бұрын

@@joshv06 Standard glock 33 mags, 308 buffer spring and i think a heavier buffer tube as well

@joshv06

4 жыл бұрын

@@austinporter9232 I would skip the 308 buffer spring and go with a carbine spring. Then 308 buffer spring is giving you a fast forward feed rate

nice build~! good info~

Waiting on my First Ar 9mm now.

At 7:49, was that a ricochet?? Heard a zinger, sounded like it flew by the camera. 😳

Lol I had the exact same two issues with that bolt!

mine dont even think about feeing lat tops with my Faxon barrel spikes upper and lower. had to get a taccom feedramp.

@joshv06

2 жыл бұрын

Has that for a while. But there was still a small gap where the flat top could stop on the feed ramp.

@joejeans7913

2 жыл бұрын

@@joshv06 gotcha I heard that macon armory actually has a fix, I just emailed them , curios to see what the fix is. thanks for the reply . love the sound of your setup, I load super heavy low power 147 also I bought some 160 gr bayou bullet Co, have tried a few loads already out of my glock only doing 590 FPS, not much Data on the load that I can find just doing a ladder load now. working my way up. I just ordered a Omega36M and a Octane 9 to run hopefully will get sometime by summer .

Yes on the hollow points unfortunately. I found out the hard way how compressed/smashed they get!! Destroys the expensive ammo of course!!!

I hate my NFA, had about 6 cases blow up in it already, gone heavier H9 buffer, standard spring, std spring with coins,, now have a 308 spring, still happens, chamber polished a bit, cases still get stuck in bcg, cannot rack them out, nobody local has a clue, everyone says its because of a very tight chamber, reloads dont work, they cannot ream chamber because barrel is very hard, FFS, at the end of my tether,I would dump if i could, but firearm licenses are a PITA, over year to license it. cannot get new barrel, needs new license etc etc, welcome to Africa

Great setup bro

@joshv06

6 жыл бұрын

Thanks, man!

The bolt hold open is actually part of the upper.

@joshv06

5 жыл бұрын

Correct. And the link bar has to be positioned with the lower's magazine using their NFA lower.

@neudimensions1320

5 жыл бұрын

Thanks for the video. Building an ar9 myself so trying to gain as much knowledge as I can.

@mousetoad7040

5 жыл бұрын

@@joshv06 Some uppers have it, some don't. Some are restamed .223 uppers with different bcg and barrel Some lowers have it, some don't. AAO carries 80% lowers with and without.

Cool I just ordered an upper and going to pick up a regular ar lower with the Kak magwell adapter. Got my ass handed to me on a 6.5 Grendel which turned out to be Shit mags These pistol caliber ars got my interest

@joshv06

6 жыл бұрын

Best of luck with your build. Remember that slow feeding is the key: Heavier buffer, lighter spring.

@edhlavaty6914

6 жыл бұрын

joshv06 I got it running 95% reliably with a heavier buffer and a New Frontier spacer. Just replaced the carbine spring with a 308/9 mm AR spring. 100% with Asc mags. It won't run Metalform mags. Waiting on Santa for optics 🎅🎅🎅

For my buffer set up I have a flat wire spring and a hydro buffer. Def reduces over the standard 9mm set up imo. Only problem with it is it’s a pain in the ass to get in and out of the gun.

@jestonjump5647

6 жыл бұрын

Reduces recoil***

@joshv06

6 жыл бұрын

Do you have a 5.56 flat wire spring or .308?

@jestonjump5647

6 жыл бұрын

i want to say i use the .308 but i'm not 100% got it over a year ago. i got it from davidtubb.com he has a good video explaining the advantages of the flat wire spring. i'm sure if you email him he will gladly tell you what spring to use.

@joshv06

6 жыл бұрын

I used to use the same spring and the forward bolt velocity to way too fast. Bullets were getting dinged up and set back into their casings. It's better to have a heavy buffer and weaker spring.

@jestonjump5647

6 жыл бұрын

maybe i'm not having that problem because i use the 9mm hydraulic buffer. I had to cut a few coils off the flat spring to get my last round bolt hold open to work... any way great video keep em coming.

You can't use hollow points on yours in particular any idea on how to avoid it?

@joshv06

5 жыл бұрын

This fixed my hollow point feed issues 100% taccom3g.com/product/taccom-glock-lower-feedramp/

@thebardock6785

5 жыл бұрын

@@joshv06 thanks

Wouldn't a steeper feedcone help with them hollow points?

@joshv06

2 жыл бұрын

Sorry, in the video, I meant steep in the other direction. But yes, a deeper/lower feed cone is always better. I send mine to Macon armory to be redone

Why won't hollow points work? I k ow for a 1911 the problem is solved with anti tilt mag followers.

@youngboyharless9769

5 жыл бұрын

The angle of the bullet gets caught up trying to feed, Flat-head style hollowpoints will give you problems. Stick with ones that are more narrow /^\

I'm using Stern defense BU9 9mm glock cut BCG (15.5 oz with weight on, 13.5 without), and arguing between an 7.7oz spike tactical buffer or a 11oz Stern defense buffer (also using stern's mag9 magwel adapter). Since this is a glock set up, should i run the 11 oz first and see how it goes?

Anybody else have a problem with mags being hard to insert? My mag well is awfully tight. I'm using aftermarket mags, but have a couple factory Glock mags ordered. Ideas?

What is the proper nomenclature for silver curved piece just forward of the trigger? You're touching it with your thumb when you begin speaking about the lower. Is that for the LRBHO, mag catch, or extractor? Mine came out on my AR9 and wondering if its a simple fix with 4-40 screws or is that something I need to send back into the manufacture.

Mine breaks firing pins a lot.... dunno what to do with that.

What barrel you got. I seen one with a ramp. Barrel but it cost $170. Or a $79 is good buy

@joshv06

6 жыл бұрын

Faxon is the way to go

Great video a lot of good info thanks I got one question hopefully not to dum it’s about the quarters in the buffer what do they do and dose every build need some ?

@aarondmason808

Жыл бұрын

The quarters in the tube limit bolt travel to keep bolt velocity down so you don’t snap off your bolt catch. I’d recommend adding the quarters even with the correct length bolt. I add quarters until there’s almost no bolt over travel.

@antone35

Жыл бұрын

@@aarondmason808 thanks for the info I will add a couple quarters 👍

What buffer tube are you running with that shockwave? Looks a bit longer then my basic one that xame with a kit.

@joshv06

6 жыл бұрын

KaK dimpled tube

Josh, How does the lighter spring/heavier buffer work unsupressed? Or do you have a different setup for Supressed--Unsupressed? Thx MJ

@joshv06

6 жыл бұрын

Run all with the KAK 10oz buffer and same spring. Works fine with or without a can.

I have a feeding problem with my ATI Milsport. I use ETS and Glock mags but still have the same problem every other round. someone says it could be the mag but as you have mentioned may be to replace with lighter spring and heavier buffer? Please help

My barrel into my receiver does not use a barrel nut--just clips in---and there are also 3 washers-where they go I do not know---it looks like the whole thing is held by the m lock hand guard-can you elaborate

@joshv06

4 жыл бұрын

What company is it from?

I'm having problems with my trigger depressing enough to grap the "restart sear or ledge" Not sure what its called but the hammer is just following the bolt home resulting in a dead trigger. I also just broke a firing pin today but it had a few 1000s rounds so I hope it was just wear. The trigger thing I can't figure out.

@joshv06

6 жыл бұрын

Is it a milspec fire control group?

@petefernandes1413

6 жыл бұрын

Nope. I did some research after this comment. I put a sd3g trigger in the build. I have a cmmg ramped bolt and come to find out there is only a handful of triggers that it will reset. It runs milspec really well. I honestly don't want a milspec trigger so I'm going to call cmmg tomorrow and see if they know any non milspec lighter triggers their bolt will run. What trigger did you go with? If so what is your pull weight?

You should put links for the parts

@joshv06

2 жыл бұрын

I'll get a KZread strike for that unfortunately.

@Killa91115

2 жыл бұрын

@@joshv06 smh well that sucks. Hopefully someone will come up with a platform called freedomtube lol

So my buddy approached me to build a single shot AR9 suppressed. Any recommendations on how to accomplish that?

@joshv06

2 жыл бұрын

I cover that in the video.

My KAK buffer doesn’t rattle like yours, did you remove the rubber spacers to have more of a dead blow effect?

What happens with a heavy spring and heavy buffer? Im having issues getting into battery and my extractor isn't grabbing the rim of bullet..

@joshv06

5 жыл бұрын

Seems like you have another problem honestly.

I have a Ghost upper with a 5.5” barrel and the same bolt as you do. Now I’m shopping for a lower that has last round bolt hold open. What lower do you recommend for my upper?

@joshv06

5 жыл бұрын

You need one that has the LRBHO mechanism all in the lower (NFA needs the upper and lower). I suggest the PSA LRBHO 9mm lower.

@MaxHeadspace9mm

5 жыл бұрын

joshv06 Thank you very much. You are very knowledgeable and your video is the best I’ve found on this subject. Building an ar9 is not as easy as building an ar15 I’ve found.

Have you ever heard of putting 2.00 worth of quarters in the back of your buffer tube?

@joshv06

4 жыл бұрын

I did that in the video. Just a little less.

I usually use PSA but I want to make an ar9 that works with an echo. Anybody know if American Resistance uppers work on PSA lowers and are they any good? Any other advice is appreciated. It must work with an ECHO 2 trigger or I dont want it.

What barrel length would you recommend? I don’t run a suppressor. I run a 10.5 on a 5.56 but was wondering when the powder “burnout” in a 9mm case became a hindrance.

@leel6429

6 жыл бұрын

I run a 5" on mine. Still quiet.

@jerrywilson6921

5 жыл бұрын

I bought the 8" CMMG Guard barrel. I figure I can always pin another 8" of supressor to it and get myself right in the eyes of our overlords if I want to use it in rifle form. That's the plan anyway. I thought about cutting mine down but then that option is off the table. You probably don't need more than 5"-6" to get your round up to speed and as accurate as it's going to get. You also have to take into consideration your sight picture, (I enjoy irons more than optics) room for accessories & personal preference. 8.5" of handguard is about as short as I find comfortable. I like to keep my elbow locked. I've put a little thought into this, along with some trial & error. AKA, wasted money and parts in the parts bin.

Hi, Thank you for this video - nice job and setup. Am seeking any info you may share on this issue. Have built a 9mm AR pistol from miscellaneous parts. It runs, but has some reliability issues after firing - sometimes the extractor seems to miss the casing notch, and the fired casing stays in the chamber. It's inconsistent - sometimes casing extract and other times not - both occurring within a single mag and across various types of rounds. Have bench checked manually with upper only, and the same issue occurs - I may need to push the bolt forward several times, before the extractor catches and pulls the casing back. Same occurs with expended and live rounds. Have removed/cleaned extractor and tried other extractor with same result. Am leaning toward diagnosis of the elusive head space issue - that either the bolt face or barrel rear surface need a few thousandths removed so the extractor can consistently engage the case notch. Interested in any feed back or experience that may relate. Thanks,

@joshv06

6 жыл бұрын

What kind of barrel, bolt and buffer do you have? Josh

THANKS BRO!

@joshv06

6 жыл бұрын

Sure thing!

@joeygonzo

6 жыл бұрын

Did u blog all the parts and prices ? Would love to check it out.

@joshv06

6 жыл бұрын

SkidTactical.com

so i have a kak 10 ounce buffer. is it cool to run that with the kak pcc xp buffer spring?

Thanks for the video. Have you heard much about needing to headspace check a new 9mm upper? thanks!

@joshv06

4 жыл бұрын

Headspace definitely not needed 👍

@Vleegz

4 жыл бұрын

@@joshv06 thanks. Just not wanting my gun to blow up you know? Is it true it's different for blowback guns?

I would put three quarters in the buffer. It makes it cycle a little richer.

@joshv06

6 жыл бұрын

3 and my bolt won't lock back. 2 is the sweet spot

If you had to do it over again would you stick with the same Barrel and BCG? Any other recommendations?

@joshv06

5 жыл бұрын

I would do the same barrel length. I have the same bolt, but in Nitride for sale here: skidtactical.com/store/skidtactical/skidtactical-glock-ar-9-modular-nitride-bolt/

Hey man great information, I just finished building my ar9 Glock set up. Shot it for the first time today, had the gun cycle well. It extracted perfectly and picked up a round everytime. The problem I had was my trigger was not resetting it would only reset if I manually pulled the charging handle. Thoughts?

@juanc.1279

4 жыл бұрын

Bolt isn't traveling back far enough. Had the same thing on a blackout

@sorenfisher344

4 жыл бұрын

@@juanc.1279 Actually no, i figured it out. I failed to install the trigger disconnect spring. Thanks for the input though.

Why a feed cone instead of ramp?

@joshv06

4 жыл бұрын

The blow back bolt does not use a traditional barrel extension

@plugBONE

4 жыл бұрын

joshv06 thanks!

Do you have a parts to help new guy building at 9mm ?

so do i get a better barrel or install a feed ramp to run the better jhps ?

@joshv06

3 жыл бұрын

Both

how would a 5.5 oz buffer with quarter and carbine spring work am looking at luth ar kit, angsdast arms, or aero h3 kit

@joshv06

2 жыл бұрын

I strongly suggest using a dedicated extended 9mm buffer. That way, you wouldn't need so many quarters that would stiffen the spring.

@jacobgonzalez8995

2 жыл бұрын

@@joshv06 i seen tho in some like the spikes st9x that are too long for the last round bolt hold open feature

@jacobgonzalez8995

2 жыл бұрын

@@joshv06 also i bought a complete 9 upper at a show with an extended buffer but it only weights 3.5oz

Or you could just buy a CMMG radial delayed blowback AR9 and not have to worry about bolt back-slap.

@joshv06

5 жыл бұрын

I made this video before that had come out. Their prices are worth it.

Im having an issue where my glock/pmag 15 rounders are feeding beautifuly but i throw in my glock 31 round mags and wont feed at all just slams the bullet into itself smashing it into the casing and its only for those extended glock mags any suggestions where i should start???? Im new to this so any advice will help, thanks guys great video too man.

@joshv06

Жыл бұрын

Thanks What Barrel is it?

@Randanator65

Жыл бұрын

@@joshv06 i bought the upper with parts kit from psa its a 16"inch gen 4 barrel appreciate the response man,

@joshv06

Жыл бұрын

@@Randanator65 might want to contact Macon armory to contour your barrel extension. In the mean time, I would suggest to leave your bolt locked back to weaken the spring and to get heavier on your buffer. I suggest the kak 9mm buffer. The heavier the biffer, the higher the bullet hits on the feed cone.

@Randanator65

Жыл бұрын

@@joshv06 ok thanks man so much man ill let you know how it goes thank you man have a goodnight brother

I’ve got a Colt AR-15 9mm in police and military A-2 configuration. With 147’s, (the only thing I’ve shot so far) it bounces and shimmies pretty rough. Is this to be expected since it is a blow back design or would this quarter thing help. It’s stock from the ground up and uses Colt/Uzi mags and runs flawlessly but it is pulsing pretty heavy. I have a Roni for my G34 and it is way smoother but of course that is locked. (This is my first blow-back AR so clearly I’m inexperienced, I actually bought it thinking it was a locked action).

Hi Josh. Great vid - thank you. I've had a 9mm upper for a while, and it works fine (Brigade Firearms) while using my Sylvan Glock Mag converter in the standard Spikes AR lower. I have recently installed the Franklin BFS 3 Binary Trigger into this Spikes lower, and 223/556 works AWESOMELY (400 - 500 rounds per minute). It works fine in semi-auto mode, but when I switch to binary, I am getting a major problem. Something is 'smashing' the lead bullet down into the casing. It looks kinda scary. My BCG has an extra weight in it, so I can use a standard carbine buffer and spring. Any ideas about why this smashing is happening?

@stephenfazen2712

3 жыл бұрын

My BCG weighs in at 13 oz and my buffer is an H2 standard Carbine sized buffer (using the SBA 3 pistol brace) weighing 4.7 oz.

@andycraig6905

Жыл бұрын

Bolt velocity is too high. Needs more weight, try an 8 or 10 ounce buffer. Springs don't hold the bolt closed, they determine how fast it moves. The weight determines how long the action stays closed.

Have you tried out any of the combo buffer + spring products in your 9mm AR? I just finished building mine and even with a stronger spring and 10oz buffer the recoil is on par with my 300 blk AR shooting supersonic. Just curious if you'd tinkered around trying to soften the recoil.

@joshv06

6 жыл бұрын

I always stick with heaviest buffer and weakest spring for recoil.