- Joined
- Oct 1, 2007
- Messages
- 19,548
Its a pin on factory bushy gas block and fluted 11.5 barrel. It prob had 5000 rounds thru it before it was disassembled. I am using the old upper on my current ar. It's gotta be something small. The colt bcg has a ramp cut out in it in front of the firing pin. Im gonna take the bcg that was born with the barrel and a pmag for him to try out