I am going to say mine are low-end, but I never had any reliability issues. I was never super excited about eh CZ's accuracy. But reliability on both have been fine.
Blowback vs Delayed Blowback recoil impulse 9mm
- Thread starter someguy2800
- Start date
Jim Watson
Member
$300, right?
Here you go, Maxim:
maximdefense.com
Not a popular place:
www.opticsplanet.com
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ROLLER DELAYED SYSTEMS – Maxim Defense
maximdefense.com
OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System Up to 14% Off and Blazin' Deal w/ Free S&H — 2 models
Shop OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System | Up to 14% Off 4.9 Star Rating on 14 Reviews for OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System...
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OP
OP
someguy2800
Member
Just saw this on YouTube. This looks like a pretty interesting setup
maximdefense.com
ROLLER DELAYED SYSTEMS – Maxim Defense
maximdefense.com
OP
OP
someguy2800
Member
Here you go, Maxim:
Not a popular place:ROLLER DELAYED SYSTEMS – Maxim Defense
OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System Up to 14% Off and Blazin' Deal w/ Free S&H — 2 models
Shop OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System | Up to 14% Off 4.9 Star Rating on 14 Reviews for OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System...
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Just popped up in my YouTube feed 5 minutes ago lol
Jim Watson
Member
Big Brother is watching.
OP
OP
someguy2800
Member
Exactly what I thought
Phaedrus/69
Member
I used to really really want one but everything I read indicated they were finicky. There's no room in my collection for guns that don't run right! Still, a reliable one would be a hoot.
LiveLife
Member
Check out this review of Maxim roller delay blowback system compared to other delay/recoil reduction systems with "No recommendation" rating due to hard charging effort (Reviewer: What if you have to clear your firearm quickly due to any stoppages?)
.Video uses 16" upper for range test of Maxim RDB at 6:30 minute of video and demonstrates "very firm" charging of bolt. (At 7:15 minute of video "Gentle Recoil System" using hydraulic buffer demonstrates "easy" charging of bolt) Link to hydraulic buffer - https://www.blitzkriegcomponents.com/pcc-hydraulic-buffer-competition-package.html
Maxim drop-in Roller Delay "RDB" for 9mm AR - My observations, slowmo and shooting. (re-upload)
Re-upload due to incorrect measurements - corrected.The Maxim RDB system is a roller delayed drop-in system for the 9mm AR. I took one out to the range toda...
www.youtube.com
And here's TACCOM DBRS slow motion video showing soft recoil and no muzzle rise - https://www.facebook.com/100064630421957/videos/611738977290732/?__so__=permalink
Watch the comparison videos and comment what you think. Another factor to consider is accelerated parts wear and replacement of roller delayed blowback system.
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gotboostvr
Member
With some of the MP5 clones getting down to just under $1k, I'm pretty tempted since a MP5KPDW has always held a special place in my heart. It was a buddy's older brother's and it was the first SBR or suppressed gun I ever shot in my more formative years.
But, I ended up with someone's budget home brew that's I've taken to calling "The Hot Mess Express" but looking past the couple layers of spray paint, chinesium hand guards and the upside down A2 bird cage... it does run like a top. The Sheel's system will more than double its cost to me, but that's still alot less than $1k.
I threw a few other spare accessories I had laying around at it... and while it's definitely more dated looking now, it's kinda cool in its own way.
But, I ended up with someone's budget home brew that's I've taken to calling "The Hot Mess Express" but looking past the couple layers of spray paint, chinesium hand guards and the upside down A2 bird cage... it does run like a top. The Sheel's system will more than double its cost to me, but that's still alot less than $1k.
I threw a few other spare accessories I had laying around at it... and while it's definitely more dated looking now, it's kinda cool in its own way.
Here's an active thread on the Maxim at AR15.com:
www.ar15.com
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Maxim Defense RDB review - Page 1 - AR15.COM
Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.
www.ar15.com
Jim Watson
Member
I read some of that stuff, debating the virtues of various parts gun PCCs.
I think it is kind of anti-informative, I feel like I know less than when I started.
I think it is kind of anti-informative, I feel like I know less than when I started.
LiveLife
Member
I read the AR15.com thread and have been following various PCC threads on Brian Enos for a decade building and testing several PCCs (Magwell block Colt pattern magazine to Just Right carbine to dedicated Glock magazine lowers).
In a nutshell to summarize the threads, initial efforts were made by match shooters who wanted more flatter shooting/less muzzle rise to improve follow up shots for faster stage times/score. This led to heavier buffer weights/recoil spring rates that evolved into short-stroke systems to eliminate buffer slam on end of buffer tube. TACCOM and others then developed delayed systems to the point of using strong magnets, air-cushion, hydraulic buffer to CMMG radial delay and to Maxim roller delay.
But as well expressed on AR15.com and Brian Enos forums, hard charging is an inherent issue and in the end, recoil reduction and front sight/red dot steadiness was roughly similar across different systems, especially dependent on ammunition/match load used. So it came down to which system to spend $300 on and different match shooters had favorites with majority of consensus slightly preferring hydraulic/magnetic/air cushion/short-stroke and other delayed buffer systems. As I already posted, other issues to hard charging of roller delay is accelerated wear of components to require replacement that other recoil reduction/delayed buffer systems do not suffer from and reliability from ammunition/match load selection.
For me, it comes down to:
- If you are not shooting matches and simply want to reduce felt recoil, heavier/adjustable weight buffer/air cushion buffer system will provide greater reliability with ammunition selection
- If you are not concerned with last round bolt hold open (LRBHO), short-stroke system is another option (There are LRBHO short-stroke systems)
- If you are shooting matches and want no front sight/red dot movement, hydraulic/extreme short-stroke/delayed buffer system is consideration to include roller delayed buffer (Factoring hard charging and faster component wear/replacement)
ExtremeSquared
Member
- Joined
- Jul 13, 2008
- Messages
- 259
A lot of widely-held preconceived notions about blowback vs delayed are incompatible with physics.
A theoretical perfectly-tuned inline blowback mechanism will result in the softest recoil impulse curve possible.
Obviously reality and theory diverge, but I question the whole premise every time this comes up, having also shot a number of delayed SMGs.
A lot of things that everyone "just knows" about recoil is less physics than psychology.
A theoretical perfectly-tuned inline blowback mechanism will result in the softest recoil impulse curve possible.
Obviously reality and theory diverge, but I question the whole premise every time this comes up, having also shot a number of delayed SMGs.
A lot of things that everyone "just knows" about recoil is less physics than psychology.
Jim Watson
Member
A post one one of the other threads on the subject discussed that. A user said his blowback with spring, mass, and ammo well matched had the "softest" recoil. A delayer said yes, but he was looking for minimum disturbance of the line of sight to support rapid fire and soft felt recoil was not the same thing.
ExtremeSquared
Member
- Joined
- Jul 13, 2008
- Messages
- 259
But then we get into physiology -- dissipation of recoil through shoulder and hands.
The body can dissipate recoil at a maximum rate.
The area under the recoil impulse curve will always be the same based on cartridge. So by changing mechanism we can mush the impulse curve around like a water balloon.
By stretching that curve out, it can be kept as close as possible to the body dissipation rate. This would be the theoretical perfectly tuned blowback.
In reality, many blowback have a pretty big spike somewhere in the impulse curve, because they are conservatively tuned for reliability. Even so, I don't agree with the original premise that delayed is inherently superior for sight picture.
marvin02
Member
Great site with lots of info about AR9s and reducing felt recoil.:
There are hydraulic buffers, roller delay buffers and a new buffer by KAK that add a delaying mechanism to AR9s.
There are hydraulic buffers, roller delay buffers and a new buffer by KAK that add a delaying mechanism to AR9s.
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