This AR-STONER carbine length upper features a mil-spec bolt carrier group with a phosphate finish, A2 fixed front sight, and a government profile barrel. The A3 upper will attach to virtually any standard AR-15 lower receiver and comes complete with charging handle, forward assist, ejection port cover, bolt and bolt carrier assembly. With a 1 in 9" twist, the 16" barrel provides outstanding accuracy. This pre-ban style upper includes a bayonet lug and A2 flash hider with a 1 3/8 sling loop. Supplied without a rear sight, this upper is a great platform for a red dot sight or iron sights (both sold separately). MidwayUSA is proud to offer this AR-STONER A3 Upper Receiver Assembly at an exceptional price!