This AR-15 complete .450 Bushmaster rifle length upper has a 16" heavy barrel with a parkerized finish, and features a 1:24 twist rate, with a carbine length gas system. It includes the new 15" MLOK rail, an M4 flat-top billet upper receiver, a bolt carrier group, and a right side charging (Gen 2) handle (patent pending), and the Muzzle Brake. This .450 Bushmaster upper is compatible with any mil-spec AR-15 lower.
BCG Included
