[ARCHIVED THREAD] - Proper buffer setup for SBR

Posted: 5/31/2009 6:54:52 AM EDT

I'm filing my paperwork next week to start my 1st SBR build. I found a buddy that was selling a POF 9.5in pistion upper. The build will be:
P-415-9-P4SX upper
Spikes lower
DPMS LPK
Magpul CTR
Surefire VFG (sbr only)
EoTech.

Will any "normal" buffer assy work for a piston upper this short or should I look for something...special?