Bushmaster Xm- 15 Qrc 5.56 16 " Complete Upper
Bushmaster Firearms Optics Ready XM-15 QRC AR-15 5.56 NATO 16" Complete Upper Receiver Assembly with bolt carrier group and charging handle. Features a Salt Bath Nitride, MPI BCG. Carbine Gas System. 16" 1:8 Barrel. Will work with any mil-spc lower receiver.