This AR-15 complete 5.56 Nato pistol length upper has a 4.5" heavy contour barrel with a parkerized finish, and features a 1:7 twist rate, with a micro length gas system with .875 gas block. It includes a 4" MLOK rail, an M4 flat-top 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.
BCG Inlcuded
