only thing it must have is a 14.5" barrel with a pinned socom muzzle brake.

it's a gen 3 upper and lower and a 13.5" quad rail. I need to determine everything I have left to put on the upper (barrel, bolt carrier group, sights, optics). it has a finished lower with all colt parts, a geissele trigger, and an vltor a5 stock kit with b5 sopmod stock.


current ideas. noveske afghan barrel or colt sopmod