AR15 6.5 Grendel 16" Upper Receiver Grendel 6.5 AR15 Upper (6)

This AR-15 complete 6.5 Grendel upper has a 16" M4 contour barrel with a black nitride finish, and features a 1:8 twist rate, with a carbine 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 6.5 Grendel upper is compatible with any mil-spec AR-15 lower.