Hey all-

What do you change with your buffer and spring with a high back pressure can?

My Colt 6933 11.5" was running with a stock spring and an H1 buffer. I just installed a stiffer Wolff buffer spring. I have an assortment of buffers from 2.9 oz to 5.6.

What combination would you use? I may take a day and keep swapping until the recoil pulse is less snappy.

Bruce

I have the KynShot RB5000HP in my SBRs.

I run a 12.5 with just an H3, no issues. Several manufacturers sell titanium weights you can use to fine tune buffers

quote:

Originally posted by badguybuster:
I run a 12.5 with just an H3, no issues. Several manufacturers sell titanium weights you can use to fine tune buffers

I have 2.9, 3.1, 4.2, 5.6 and an OdinWorks adjustable that comes apart with a selection of internal weights. I will be able to find the combination but I was looking for insights to shorten the process.

I usually feel that a stock Colt spring will do the job but with the bolt not closing on a dirty BCG after 100 rounds I am thinking a little more spring pushing on it might be the prescription.

I have never played with buffer spring weight before so I am wondering what new variables that might introduce.

Bruce

quote:

Originally posted by Mars_Attacks:
I have the KynShot RB5000HP in my SBRs.

What issue were you trying to solve? What level of improvement did it give you?
I will pick one up when I have an extra $150 in the budget for experimenting on a range run. I am trying to make this rifle bombproof as it is my "bump in the night" gun. I like to keep the whizbang cool gadgets for the range toys. If it's 75% as good but 100% reliable, that's what I keep in the defense guns.

Bruce

I've run the absolute crap out of them with FRTs on my suppressed SBRs.

Hydraulic buffers have been around since the beginning.

I also have a tungsten H3 in the 607. It runs flawless, I have never paid attention to the recoil.

Thanks for this thread, I am looking for a suppressor for the first time for an AR(s).

I have a Colt Socom M4A1 and FN Collector M4, Bushmaster, ... that I want to suppress.

I believe the Colt and FN both have H2 buffers but not sure what spring is in them.

I appreciate those who have come before and willing to share on this.

HK Ag

I have one of every size buffer and spring but I shoot 12.5" 5.56 with a low back pressure can the most. I started it with an A5 system with the regular power spring and an H2 buffer and it ran great from day 1 and I've never tuned it beyond that. I have an H3 buffer on standby for whenever I drop in the FRT.

If you want to run A5 you need all 3 parts to match the A5 tube is about 3/4" longer, rifle length spring and A5 longer buffers. I think they are 10% smoother recoil than a standard carbine setup and the longer length of pull works for me.

I run a RC2 (pretty high back pressure) on 6933 with the Geislle spring and an H3 buffer and it seems to be pretty workable. FWIW.

I will start there. The setup I was using was slamming hard. I looked inside the buffer extension and it looks like it has been pounded with a ball been hammer, at the end.

I may test it out again tomorrow.

Bruce

buffer & springs are just a band-aid to your issues... Need to look into an adjustable gas block for your solution.

quote:

Originally posted by CandyMan.45:
buffer & springs are just a band-aid to your issues... Need to look into an adjustable gas block for your solution.

I don't disagree. I have them on a couple other rifles.
I want to avoid that solution for a couple of reasons.
1) I dig the fact that this is a Colt Commando 6933. It's my "bank robbery scene in Heat" rifle. I want to keep it stock.
2) I'm not there yet as far as trusting the reliability of an adjustable on a defensive rifle.
3) Other people use this rifle and run it hard in stock-ish form. I want to decode this puzzle and find a way to avoid permanent mods.

Before any permanent mods, I would pitch the Omega can in favor of a Huxwurx or other low-backpressure can.

Bruce

AGB are a solution, but also introduce complications of their own. Throw an FSB into the mix and I'd push it down to the 3rd or 4th option to find a fix.

If a new can is one the table. Huxwrx is still the king of venting, but there are a bunch of cans on the market nowadays that are close in venting but quieter than Hux.

quote:

Originally posted by ibanda:
AGB are a solution, but also introduce complications of their own. Throw an FSB into the mix and I'd push it down to the 3rd or 4th option to find a fix.

If a new can is one the table. Huxwrx is still the king of venting, but there are a bunch of cans on the market nowadays that are close in venting but quieter than Hux.

I have a sentimental attachment to the Omega but I am realizing that there is better technology now. The Hux is impressive. I got to shoot it on a Bren full auto in 300 BO.

What are the others that are quieter? I don't want to trade back pressure for noise as a new tech can will likely do time on a hunting rifle, as well.

Bruce

quote:

Originally posted by CandyMan.45:
buffer & springs are just a band-aid to your issues... Need to look into an adjustable gas block for your solution.

Yes, but at least they'll keep the gun from getting beat to death in the meantime. Some of these older configurations with old cans, if you want to keep the look, you're just going to have to do the band-aids.

I have a retro build I'm finishing up, and I intend to keep my Polonium on it. It's too late for building it up with a venting gas tube, so it's going to have to be buffer and buffer spring stuff unless and until I find any internal stuff that would make the difference. Sounds like OP's in the same camp.

That said, all the extra dicking around to tune a rifle against these old cans gets harder and harder to justify when newer suppressors coming out just don't require it. The only real stumbling block is that they look out of place on stuff like a Colt Commando or a GAU-5. Then again, so would an Omega 300 with those massive vents on the front, so....

quote:

Originally posted by RNshooter:
What are the others that are quieter? I don't want to trade back pressure for noise as a new tech can will likely do time on a hunting rifle, as well.

Quietest, lowest backpressure can on the market currently is the Stealth Additive Works Tisha in 5.56. I have two, one in 5.56 and it is phenomenal on short AR's and my SBR'ed PS90. Ridgeback Defense also has several flavors of the Rhodie line that's right there with it in suppression with a bit more backpressure, but I'm not sure which specific one to direct you to, there's a half dozen versions of it IIRC.

Now, I'll throw out a suggestion that may seem a bit... odd, but bear with me, here. BOE Suppression Incolite 9M. Yes, it's a modular 9mm can, but it's not the usual fare modular can where the short config is loud as shit and you never end up taking off the extension. This is a different animal. It's their full size Incolite 9m suppressor with an added 2.5" module that kicks it up to rifle rated for .308, 5.56 SBR's, etc. It's printed Inconel, so it's hell-for-stout, weighs 10.5oz fully assembled in the long config, and comes with a titanium direct thread adapter. Hub compatible. I picked one up on a lark back in July and it has quickly become one of my favorite cans. The suppressor community at large has caught wind of it and they're trying it on everything, and so far... it's at least right there with, if not outright smoking a lot of the competition, on rifles. Now, it is a traditional style baffle setup and they're clipped, but the backpressure isn't bad at all, especially on AR's. I haven't tried mine on a rifle yet, but I've had it on handguns, PCC's and had it on my .22 Charger last time I went out. It was quieter than my B&T Tiger, which is one of the current best .22 cans, and .22 through a 9mm can isn't something I'd typically expect great results out of. If someone wanted one can to move around to a bunch of different stuff, there's finally an option on the market that isn't a "do it all, but do none of it well" waste of money, and that's not even what they were going for with it.

Specs and restrictions:

- Dimensions: 7.5" L x 1.5" dia

- Weight: 10.5oz assembled (8oz - short config)

- Minimum Barrel Length Restrictions:

- 9mm and similiar - no restrictions

- 350 Legend subsonic - no restrictions

- 350 Legend supersonic - 12"

- 5.56 & 7.62x39 - 10.5"

- 300 BLK supersonic - 8"

- 300 BLK subsonic - no restrictions

- .308 / 7.62x51 - 16"

- Caliber Firing Schedule Restrictions:

- 9mm and similiar - no restrictions

- 350 Legend subsonic - no restrictions

- 350 Legend supersonic - limited full auto

- 5.56 & 7.62x39 - limited full auto

- 300 BLK supersonic - limited full auto

- 300 BLK subsonic - no restrictions

- .308 / 7.62x51 - Semi-auto only

Good information! And agreed about the Omega 300 looking out of place with the waffle brake on the front. It looks appropriate with the flat end cap, though.

I will look at the other cans you suggested. The 9mm can is very interesting.

Edit: I may try the .30 cal end cap on it. So far, I have been shooting this .30 cal can with the .556 end cap for maximum sound reduction. That also means maximum backpressure. I wonder if the .30 cal end cap will be appreciably less gassy without being too much louder. Testing soon.

Bruce

This message has been edited. Last edited by: RNshooter,

quote:

buffer & springs are just a band-aid to your issues... Need to look into an adjustable gas block for your solution.

which adjustable gas block uses the pins that are in the factory colt gas block? I'm not trading those for some silly set screws in a defensive rifle.
Thanks to advise.