This AR-15 complete .450 Bushmaster rifle length upper has a 16" heavy barrel with a 416R Stainless Steel 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, a flash hider, and a side charging handle (Gen 2) (Patent Pending). This .450 Bushmaster upper is compatible with any mil-spec AR-15 lower.
BCG Included
