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.
Cartridge 5.56x45mm NATO
Finish Matte
Material Aluminum
Barrel Length 11.5 Inches
Twist 1:9 Inches
Threads 1/2"-28
Barrel Contour HBAR
Sights Yes
Barrel Finish Manganese Phosphate
Chrome Lined Yes
Gas Block Diameter 0.75 Inches
Gas System Length Carbine
Upper Receiver Type A3 Flat-Top
Barrel Material 4140 Steel
Handguard 2-Piece Polymer, CAR-Style w/Heatshield
Bolt Carrier Assembly Included Yes
Muzzle Device A2 Flash Hider
Mil-Spec or Commercial Commercial
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