Which buffer to use?

snakep · May 9, 2017

I'm building an AR with a regular 16" carbine upper. I would like to attach a fixed A2 buttstock replacing the collapsible stock. My question is which buffer/spring combo to use. Can I use the longer rifle buffer/spring set that comes with the fixed A2 buttstock? Or just re-use the carbine buffer and spring that would normally go with a collapsible stock? thanks...s

Hit and Run · May 9, 2017

Rifle buffer that came with A2 stock.

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bkuether · May 9, 2017

Hit and Run said:
Rifle buffer that came with A2 stock.

Sent from my SM-G930P using Tapatalk

Correct. Use both the spring, and the long buffer that came with the A2 stock.

Do NOT use the carbine buffer or spring.

Sticky · May 9, 2017

bkuether said:
Correct. Use both the spring, and the long buffer that came with the A2 stock.

Do NOT use the carbine buffer or spring.

^^^ this..

snakep · May 9, 2017

Thanks all, appreciate the advice!

outrider58 · May 9, 2017

Now, should it not run right, you may need to rethink this. That set-up is made for a rifle gas system. Given you are going with a carbine gas system(different upper), results can vary. Try it, but you may find it to be a bit under gassed. Might require a lighter buffer(carbine and spacer).

http://www.brownells.com/rifle-part...rdware/ar-15-m16-buffer-spacer-prod44889.aspx

If I'm wrong, someone will be along to straighten me out...

Mike3888 · May 9, 2017

outrider58 said:
Now, should it not run right, you may need to rethink this. That set-up is made for a rifle gas system. Given you are going with a carbine gas system(different upper), results can vary. Try it, but you may find it to be a bit under gassed. Might require a lighter buffer(carbine and spacer).

http://www.brownells.com/rifle-part...rdware/ar-15-m16-buffer-spacer-prod44889.aspx

If I'm wrong, someone will be along to straighten me out...

I'm thinking u are right, but could go either way. Example. My 20" 6x45 with rifle length gas and fixed stock short stroked. ( easy fix ) my 6.8 had a mid length gas and fixed stock and no issues. So who knows but I'm kinda interested now. To answer op question. Yes on buffer and spring that comes with stock
Good luck

Which buffer to use?

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