Bushmaster Mass Legal M4/A3, not too much I could change. Tele stock pinned to a shorter length, Aimcomp ML2 and 3 power magnifier on an ARMS mount
Started as a M1A standard loaded: J-Allen stock, Fulton Armory op-rod, NM gas block, Vortex flash hider, Sadlak NM piston, spring guide, oversized...