AR15 18" Upper Receiver 5.56 AR15 Upper

This AR-15 complete 5.56 Nato rifle length upper has a 18" heavy contour barrel with a stainless steel and black nitride finish with bear claw flutes, and features a 1:8 twist rate, with a mid length gas system. It includes the new 15" MLOK rail, an M4 flat-top forged upper receiver, a bolt carrier group, a flash hider, and a rear charging handle. This 5.56 Nato upper is compatible with any mil-spec AR-15 lower.