No, you don’t suck at this. You’re quite good and we REALLY Appreciate the time you took and the information your sharing. Thank you very much.

@Optimization_Coach

9 ай бұрын

Agreed. Excellent information. I am always looking for ways to improve my CMMG Banshee.

I contacted Maxim and they confirmed that 30lbs to charge the rifle is normal. They said it takes that much to overcome the resistance of their roller delay system. Well, at least you knnow it's doing something.

@Blowback9

Жыл бұрын

Great info! Thanks!

@DLW23940

3 ай бұрын

LevAr....by Springfield Arms...you're welcome

Excellent presentation. Have you looked at the MEAN 9mm bearing delay upper receiver? Comparing the MEAN system to your other work. Thanks for your work.

When mine arrived it had only a light coat of oil, and it was very difficult to charge. I just took it apart and using a toothpick, i added some high quality grease to the rollers and the slot they interact with. Oil on everything else. Ran the action several times and now the force required is dramatically less. The difference is quite noticable, although I've not fired it yet to compare.

@Blowback9

18 күн бұрын

Mine came greased. Watch for preload on the rollers - preloading by the bolt pushing it back slightly in the tube with the upper closed makes it much easier to charge, but makes the mechanism less effective at delaying the action.

This is great information! Looking forward to more of your videos.

I bought it! I like it! Im strong like bull, LOL 😂 😂 . I recomened it. I Shoot IDPA no issues. If there is a malfuntion it s already out of battery, so easy to pull back. It did not cost $200, it takes all the sillyness out 9mm gental recoil systems, one and done. I use a Devil Dog side charger to look cool and brace the stock on my body. Remember you start out with a chainber flag or already loaded? This video series if very good and informative, thank you. I don t have to do anything I just watch your videos and do what I do, great!! Thanks again J.

@Blowback9

8 ай бұрын

The Maxim should be good for competitive shooters, but it's a different mindset. For the average non-competition/casual/plinker I'd suggest the Gentle Recoil System every time. Maxim needs to come up with a left-side camming charging handle like the LevAR. That would be a perfect match for the RDB and solve the first round charging pressure.

@johnL-xk2js

8 ай бұрын

@@Blowback9 Yeah, I ordered the BCG you recomended, very nice. Roller delayed system a definit no go with a hyperfire trigger! great trigger but adds to charging issue.

Thanks for the video! I built my AR9 in Fall 2018. It was wild trying to learn all the info. I ended up with a completely useable and wildly fun Frankenstein build with an 8" barrel. It was onlybised for grins on the range. Fast forward to 2022 and now I shoot IDPA and USPSA a lot. All of a sudden i needed a legal rifle. So I built a 14.5" Faxon upper with a permanent muzzle brake to bring it up to 16". I then ordered a kyshot and proceeded to "tune". Well, it kind of faded into the background on me and i lost interest. Thanks for getting me excited again! I think I'll tinker some this weekend :)

The G3 and PTR91 roller locked guns have a slight mechanical assist on the charging handle and such could set up on an AR. The lever that is attached to the changing handle provides a little leverage to break the rollers loose. It should not be too hard to design that into the AR15 charging handle. But then 32 lbs pull is not a lot for me, but still is more than it should be.

@Blowback9

10 ай бұрын

The G3, MP5 etc, handle pushes on the bolt carrier, not the bolt. This pulls the bolt backward, unlocking the rollers from behind, which is much easier. You're not pushing directly against the mechanical delay. With the Maxim, the AR charging handle pushes against the front of the bolt and has to directly overcome the mechanical delay just like a cartridge does. This is why they're so different in charging force.

@loquat44-40

10 ай бұрын

@@Blowback9 There is a lever on the changing handle that provides a mechanical advantage for about 1/4" of travel. If the lever is not properly engaging on the sheet metal of a G3 it will require a lot more than 32 lbs of force 'to break' the rollers free. The rollers on the Maxim system are locked onto a guide rod. A sleeve that is fitting over the bearings locks them place; when it slides like a G3 bolt carrier, the bearing are unlocked. The rollers of a G3 lock into a barrel extension. It would not be difficult to design an AR charging handle to have an articulated lever to facilitate this. Go get a PTR-91 to observe what happens when you grasp that lever that is lying flat against the sheet metal of the weapon. When you grab it, it goes to a 90 degree angle with enough mechanical leverage 'to break the rollers loose' prior to you pulling the charging handle the full distance to move the BCG to eject what is in the chamber or to pickup a round from the magazine. The engagement needed to lock a 7.62x51 is considerable more than for a 9x19 load.

@Blowback9

10 ай бұрын

@@loquat44-40 Thanks for the info abou the G3! Check out the Springfield LevAR. It's articulated, just on the wrong side. I tried it and it works, it's just awkward. Someone on ARFCOM developed their own which cams from either side. We just need someone to produce it profitably and it would fix the whole problem with the Maxim.

Great video. Thank you!

is it really that hard to operate?? are you willing to do a comparison with the scheel RDB? that would be the ultimate showdown for mechanical delays for blowback AR9s

@Blowback9

Жыл бұрын

Normal AR=10lbs. MP5=12lbs. Maxim=32lbs. Yes, it's significantly more difficult. Some people will be fine with it, many won't. See here for Scheel comparison: www.ar15.com/forums/ar-15/Maxim-Defense-RDB-review/15-780933/&page=5#i8572595

@mbozz

Жыл бұрын

@@Blowback9 dang, that’s really big difference, thanks for the reply and the link, I’ll be looking into it!, still are you interested in doing your own comparison? I’m really interested in your opinion about it

Interesting. I wonder how the maxim PDW stock buffer does in comparison. Trying to decide between this RDB buffer paired with a maxim PDW stock on an AR9, or a law tactical folder with a JR carbine buffer tube, tubbs flatwire and Kynshot.

It was a little bit harder than the 308 spring that came with the fm 9

LevAR charging lever is a match made, what more, I get to charge AK style and freak everyone out.

Did you re-upload this? I swear I thought I watched this already. Also, have you reviewed anything from dead foot arms? I have a colt pattern pcc I’m building but I’m getting into the weeds of your parts suggestions but I know I still want to “fold” the pcc.

@Blowback9

Жыл бұрын

Yes, I had to do a reupload to edit some incorrect numbers. I haven't reviewed dead foot arms, but I have a Law folder and it works great.

How would this system or your gentle recoil setup feel in a CMMG Banshee with their RDB system?

@Blowback9

Жыл бұрын

Reports are that the Maxim system and CMMG RDB are not compatible.

instant subscribe

have you had any experience wit the Shceel roller delay buffer? it cost more but is alot more tuneable. i plan on trying it in a 10mm blow-back carbine because i think anything will help

@Blowback9

Ай бұрын

No, sorry! Too rich for me to purchase right now.

it took a long time to get here and it took me a long time to get it out to the range but i put about 100 rounds through an 8" psa px9 with the roller delay kit and I was disappointed. Mine is still pretty damn violent and hard to fight with any type of fast rate of fire. I really wanted this gun to work as a range toy. Just something to mag dump on paper. using subs and a suppressor helped, maybe i should try it with a much shorter barrel.

@Blowback9

10 ай бұрын

Or check this out... blowback9.wordpress.com/2023/05/28/9mm-ar-gentle-recoil-buffer-system-final/ The original GRS setup really reduces the recoil feel for a 9mm AR. More push than punch.

@apollow_g1025

10 ай бұрын

@@Blowback9 I’ve read your write up and watched the video, maybe I’ll try it out if I can find a cheap upper and lower. I have a 3 inch barrel in my parts bin. Do you have any opinions on the broad river mp5 style ported barrel for ar9s? Worthwhile in combination with the GRS? If you can afford subs, what’s the difference anyway?

@Blowback9

10 ай бұрын

@@apollow_g1025 The BRT barrel is interesting and great for building a look-a-like, but a cheap 3" barrel keeps many supers subsonic all by itself. I had a 2.5" barrel made for just this purpose, works great.

@Joe-hz1nw

3 ай бұрын

@@apollow_g1025if you have the funds, just invest the $1kish into an MP5 clone. They are awesome. PTR or MKE (imported by century arms - made on H&K tooling) are both great. They are so much better you’ll never want to shoot any other PCC.

Well, now im curious what would happen if you trued to ise this in conjunction with a CMMG RDB upper. Wonder if you could even get it to cycle?

@Blowback9

9 ай бұрын

I know it's been tried - if you search around you should find some information about it.

Let me guess? The MP5 has less recoil because it weighs more?

@Blowback9

10 ай бұрын

Nope. It's because the roller delay system was so well designed.

Does the maxim work good suppressed?

@Blowback9

2 ай бұрын

It seems about the same to me, but other folks have reported that it's not as good when used with a suppressor.

Would a JPRifles Silent Capture Spring work better? Especially in a Maxim Defense MDX or MD9?

@Blowback9

9 ай бұрын

The SCS would not work better at reducing felt recoil. It doesn't have a mechanical delay built in like the Maxim.

I was thinking about this system in conjunction with a side charging upper, would that help in leveraging the charging pressure?

@Blowback9

11 ай бұрын

Someone tried it and reported it helped a little.

Yes it’s bad to charge the first round

Does it work with cmmg BCG?😮

@Blowback9

Жыл бұрын

So far, reports are that it does not work with CMMG's RDB system.

How about a blowback 10mm AR? I may have to explore this.

@strohausii

3 ай бұрын

Macon armory has a DI 10mm, I keep hearing good things of them.

@a4channoob

Ай бұрын

have you tried anything in your 10mm AR yet? i was planning on trying the Scheel roller delayed buffer in mine but it cost alot more

I think you mean it has ball bearings, not roller bearings, mp5 style roller delay has roller bearings (cylinder shape rollers) and this has a ring or ball bearings.

@Blowback9

3 ай бұрын

True, but Maxim named it "Roller Delayed Blowback", not "Bearing Delayed Blowback" which would be more accurate, so I'm just calling it what they called it to avoid confusion.

@ZombieWilfred

3 ай бұрын

​@Blowback9 Calling it a "roller delayed blowback" because that's what they call it does make sense, but calling the bearings roller bearings, though, is describing a component part, so that doesn't make sense in the same way...

@Blowback9

3 ай бұрын

@@ZombieWilfred It's just semantics. I distinguish it from the MP5's roller bearings in the first 5 seconds of the video.

@ZombieWilfred

3 ай бұрын

​@Blowback9 Yeah, it is semantics, but if you're doing a technical video breaking down how it works and if it's effective, then the semantics matter. You say that you distinguish it in the first five seconds, but the entire point of my comment is that what you said is that it uses "bearings, not roller bearings." and go on to say that the MP5 uses "rollers" which ARE roller bearings and the bearings in the Maxim system are Ball bearings. It may be "just semantics" to you, but to me they matter. If you're going to do a breakdown on a peice of technology I believe that it is important to use the correct technical terminology...

@Blowback9

3 ай бұрын

@@ZombieWilfred LOL.

Now to make them more affordable..... who's gonna buy a $3000 kayak then put another $8000 in equipment on it?