AR15 Upper Receiver 4.5" 7.62x39

This AR-15 Complete 7.62x39 pistol length upper has a 4.5" heavy barrel with a parkerized finish, and features a 1:10 twist rate, with a micro length gas system. It includes a 4" MLOK rail, a M4 flat-top forged upper receiver, a Bolt Carrier Group, Flash Hider, and a rear charging handle. This 7.62x39 upper is compatible with any mil-spec AR-15 lower.