AR 10 buffer help

[zandroes]

I recently installed a standard A2 buffer system my AR 10 and also installed a magpul prs. Now my bolt will not lock back. I have a smaller buffer from the collapsible stock previously on the rifle. But haven't tried it.
My question is, what buffer are you using with your similar setup?
Any help is appreciated.

 

[grwd]

Are you using a 308 specific buffer and spring?

Are you using a 308 specific PRS?

 

[zandroes]

PRS is 308 specific. Buffer and spring doubtful. I ordered a standard A2 buffer tube assembly.

 

[Nighthawk]

Mark's Firearms carries 308 buffers and 308 buffer springs for both tubes.

 

[grwd]

the 308 carbine buffer is designed differently; you need both. thats your problem.
thank you, come again!