Bushmaster AR-15 A3 Pistol Upper Receiver Assembly 5.56x45mm NATO 11.5″ Barrel

This drop-in A3 Pistol upper will attach to virtually any standard AR-15 lower receiver. The assembly comes complete with dual flip aperture rear sight in a removable carry handle, charging handle, forward assist, ejection port cover, bolt and bolt carrier assembly. The barrel’s 5.56x45mm NATO chamber, M4 feed ramps, chrome lining, and 1 in 9″ twist rate ensure reliable feeding and functioning with a wide variety of both commercial and surplus ammunition.   The Pre-ban style upper includes a bayonet lug, flash hider, and detachable carry handle providing added versatility for mounting optical devices or accessories. The Bushmaster upper receiver is an excellent choice for shooters looking to build a quality Pistol or Short Barreled Rifle (SBR) at an affordable price.   Please Note: An “AR-15 Pistol” upper assembly has a barrel less than 16” in length. Pistol uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.   Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.