AR15 buffer weight vs Silencer

9

9x19

New member
A question for you guys who run a silencer on an AR15.

Do you run a heavier buffer because of it? If so, how heavy (H2, H3)?

Lets say a 10" barrel in 5.56 and also .300 AAC, both with carbine gas tubes.

The silencers would be an AAC 556SD and Slincerco Omega.

Thanks in advance.
 
It depends. A 10" 5.56 with carbine gas and a suppressor almost demands at least a heavy buffer at least to get acceptable function. A 10" .300 with carbine gas and a suppressor will do just fine with a standard carbine buffer.

The buffer is part of a system and has to work with the other components in the system.

I'd also just buy a .308 silencer and use it for both 5.56 and .300 if that is an option.
 
I have a Griffin Armamant SOB (Suppressor Optimized Buffer) in my 10.5" 5.56 LMT. It's a little heavier than an H2 buffer, but lighter than an H3. If I wasn't worried about reliability when shot dirty without the silencer, I'd use an H3.

9x19 said:
Lets say a 10" barrel in 5.56 and also .300 AAC, both with carbine gas tubes.
Click to expand...
I've never heard of a sub-16" 300 BO barrel that used a carbine-length gas system. Even most 16" 300 BO barrels I've seen used pistol-length gas systems.
 
On my Rock River Arms with 10.5" barrel and Gemtech Halo suppressor I run a H3 buffer. Even with that I got to much blowback, so now I run an H3 buffer and Gemtech adjustable bolt carrier. The combo works great.
 
I put an adjustable gas block on my 16" 300 w/carbine gas and I feel I basically wasted the $$. With the ammo I'm using, it's under-gassed with the adjustment wide open. W/o the muffler, I even went to a "light weight" bolt carrier to get 3 o'clock ejection.
 
I put an adjustable gas tube on my AR. I only shoot one load with my NM upper so I was able to adjust the tube to make the brass fly out about 4-6 feet. Works good. Use the same buffer and spring.
 
Thanks for all the replies... I have some spare buffers and some tungsten weights so I guess I'll start with H2s and go from there.

I've never heard of a sub-16" 300 BO barrel that used a carbine-length gas system. Even most 16" 300 BO barrels I've seen used pistol-length gas systems.
Click to expand...

Hmm...maybe mine's a true oddball then... but it is indeed carbine length.

PSA-ZG%20SSBR300_zpskdphqwmm.jpg


My 16" also has carbine length gas.

PSA-ST%20AR300_zpslakbg4gv.jpg
 
Both of my 16" 300's are carbine gassed. Work fine but at the lower limit of functionality. That's the reason for the light bolt carrier/standard buffer combo.
 
Thanks.

The 16" .300 has had a steady diet of 125gr supersonic, and runs fine with a standard buffer.

The 10" works with the same ammo without the silencer... I just wasn't sure if I'd need to go up in buffer weight with the Omega out front.... plus I picked up some heavy bullet subs to try, and not sure how that will change things. Hope to get to the range soon, if the rains will stop long enough to let things dry out a bit.
 
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