Radial Delayed Blowback - A Closer Look
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- Опубліковано 18 вер 2024
- With this simple animation, you can get a better look at the inner workings of our patented Radial Delayed Blowback operating system.
We currently offer this system in the following calibers:
9mm
.40 S&W
.45 acp
10mm
5.7x28
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When people with conventional blowback AR9s and PCCs say "itz jus uh nine milluhmitter how much ken it rick-oil?" just smile and nod 👌
It's surprising for sure. You wonder why a 9mm has more recoil than a rifle round 🤯
@CMMG Newton's 2nd and 3rd laws and greater bullet mass? Although that wouldn't apply specifically to 9mm, 10mm and .45 ACP do end up having more muzzle momentum than 5.56 NATO.
In my experience with 3 PCCs and an 8" Banshee in 9mm, all of them had a softer recoil impulse than my AR-15 in 5.56.
I will say that despite having half the barrel length and marginally less weight, the Banshee shoots the softest.
I love that you release such wonderful videos like this. Makes me appreciate my MK47 on a deeper level.
Bought the 10mm Banshee. It is wicked cool
Did you get it already??
CMMG, makers of quality firearms and NOW, quality animation
Have a BCG/Barrel kit on order since Dec thru OP... Waiting anxiously for the kit to be delivered to finish a build!
Love this AR pistol been having the 9mm 5 inch barrel for 1 year and a half and let me tell you that blowback ain’t no joke it shoots so fast it’s like a you shooting a automatic pistol never had a jam since I had it
NICELY DONE ! So there is no need for a Gas Block and a GasTube when running this system, correct?
Correct. The bolt and chamber do all the work
what is the name of the background music?
How is compensation made for different loadings, ie +P and very light loads?
NOTE: At 0:41 receiver is misspelled (reciever) .....Great animation.
Does the radial blowback require a special buffer and/or spring?
What weight buffer is recommended with a CMMG BCG for .45? Still 10oz or can you get away with a lighter one? Also, somewhat off-topic, are barrel nuts universal on the AR platform?
The barrel nut varies depending on what handguard you plan to use but the thread is standardized. The CMMG RDB system will use any AR barrel nut. I used the ones that came with my railed FF handguards.
I love mine best ar9s in the industry
Cant wait till my turn in the backorder line gets here and i get my 5.7x28mm conversion upper 😍
The backorder line is real, I ordered from them back in Nov.....still waiting...good luck👍
@@Nathan0486 it'll come when it comes.
Pandemic, lack of leadership from a fractured government to worried about itself to actually lead, and local governments allowing their areas to become areas without rule of law have triggered a panic and more folks than ever have realized the only people they can depend on for their own safety is themselves.
Makes for a long line. 🙂
K&M tactical had them in stock
I just hope mine actually gets here before they’re banned lol.
I dont know if it was for the animation limitations but the bolt should move in a screw motion for it work. Am I seeing it right?
Not sure what you’re seeing but the bolt is definitely rotating.
Super clever engineering! Now, make a few proper rifles with this system & you'll have a customer for life.
No rifle powered rounds will not work
@@corvoattano4777 According to the Spanish, French, Germans and many other's, that is not a correct statement.
@@christopherfisher128 radial delayed blowback system has bene used before? In rifles?
@@corvoattano4777 Not specifically Radial but roller and delayed blow back of a couple other designs as well. The G3 is a roller delay.
@@christopherfisher128 comparing one type of system to another doesn't work m
There is a video comparing mp5 with cmmg 9mm in slow mo and cmmg has significantly more recoil compared to mp5. Also even the roller delayed blowback in something like 762x51 kicks like a mule not as smooth as gas operated system.
And radial delayed probably won't even work with 5.56mm only for pistol calibers
Is the recoil delayed only by the friction of the bolt lugs’ rotation? As the round count increases won’t the friction become reduced causing closer to instant recoil?
I think I’m misunderstanding something. Would anyone with better comprehension please explain this to me better? Thanks.
Think of it like like a screw, it takes longer to move because it has to rotate. Normal blowbacks are like a nail, moving straight back. Because it takes longer to move at first, the bullet has time to exit the barrel and the pressure drops causing less pressure to push the bolt back.
Wonder if it could be applied to traditional 556?
No point. This system is designed to bring some of the advantages of the gas system to blowback guns. 5.56 AR-15s are not blowback, and that's a good thing since the barrel pressures of modern rifle rounds are too great to allow use of a blowback system.
AR-10/15/18, AK 47/74, AUG, and any other reasonably powerful semi-auto rifle since the M1 Garand has used a gas system, which delays bolt reciprocation at least as long as the DRB system portrayed in this video, and the reciprocating force is regulated by the length and aperture width of the gas tube.
The DRB system in the video uses resistance in the breech lug to delay blowback, which may see reduced efficacy as that resistance gives way to wear of contact surfaces. Since the bolt of a gas rifle like an AR-15 is totally locked until the gas system unlocks it, there should be less wear by comparison.
In short, the existing AR gas system is already better, and implementing a blowback system, even if radially delayed would be a bad idea. Probably catastrophic, actually.
Hope this helps.
If you want a delayed blowback 5.56, there are the HK33 rifles...
I'm curious if there is a way to use this same system with higher pressure cartridges like rifle rounds.
I think most rifle-round systems in the AR are all gass-blowback designs. Would be interesting if they could make a radial delayed that would survive the higher impact of the rifle rounds. :)
Ya I asked them about .300 blk cmmg said no go
@@ShadowRhapsody81 I don’t think it’s a matter of surviving, the bolt on an AR is a very similar design after all, it’s probably more an issue of slowing down the bolt enough.
Probably yes, afteral G3 and FAMAS work on a similar principle, but you would need a fluted chamber or waxed cases of the cartridges to work reliably.
would be nice to get one but here in the PRK (people republic of kalifornika) its a no go ... lol
Take my money where can I buy one. I’m tired to clean the crud out of my upper receiver on the regular blow back 9 mm carbine’s
Magic!
RDB for MK47 coming soon?
Why is a gas key shown in that system?
It's not a gas key exactly. It is there to help keep the BCG aligned in the upper, and is blocked off on the front to prevent it from being inserted into a firearm with a gas tube.
@@CMMG Thank you for the clarification, Mr. CMMG!
is it 10mm or 9mm??? تحياتي
Both, they offer versions in both of those calibers.
Yall sell the parts kits for these?
Depends on the verzion. The 9, 45, and 10mm are all bespoke top/bottom matching settups. The 5.7x28 though, they offer in both matching top/bottom that uses fn magazines, and a "conversion kit" with custom magazines that works with any mspec m4 lower.
@@ShadowRhapsody81 i meant like a stripped lower and upper, putting the gun together from a parts kit.
@@James-cr5mc ahh that. Looks like they have a bit of everything on their website, from full part kits, to triggers/grips.
Cmmg.com :)
@@ShadowRhapsody81 awesome. To me buying a few parts at a time is like layaway so it helps me get more guns
@@ShadowRhapsody81 You can, for example, switch the 9mm upper between Glock-magazine and AR-magazine lowers, assuming the AR magazine has the 9mm follower/spring kit installed. Personally, I like using the AR lower better, as the magazines feed a bit more reliably.
I can't read the text and look at the awesome graphics at the same time. Lame.
None of these animations are correct. The bolt does not lock. The bolt immediately moves rearward, just like with a blowback system. It just moves slower until the carrier has fully moved back against the cam pin.
We didn't claim that it locks. It does rotate in the barrel extension as shown, and the barrel extension engages with the chamfered lugs of the bolt. That little bit of rotation is what delays the action.
@@CMMG You don't claim it locks. Everyone else that buys it and tries to explain it says that it locks. And all of the animations I've seen show it locking. They show the carrier moving before there is any movement in the bolt. I think everyone is taking an animation of an AR15 bolt and carrier, modifying the picture to show the wedge shape on what is normally the locking lugs, then playing the animation.
Obviously you know it doesn't lock. You designed it. I am curious if you ever tried a gas delayed blowback system like on the HK P7? I know you've tried gas operated, but did you try gas delay?
curious to see how the internal 45° slots in the barrel exention are milled ?
just build our damn guns, fix your backorder
Going on 23 weeks for me, what about you?
"fix your backorder" LMAO nice 👌
@@greatmtnclimber2579 22 weeks here.... Frustrating....
Move out there and volunteer to help the production team?
@@ShadowRhapsody81 if their paying good money hell yeah ill go build rifles
Yeah but your fucking lead times are ridiculous! 20 weeks? I'm about ready to trade someone 2k small pistol primers for a 9mm 5 inch barrel and bolt kit.
F-ing noise
I really thought there was something more to it, kinda disappointing TBH. Also shows how pathetic straight-blowback AR-pattern PCCs are in that the bolt doesn’t even rotate.