This AR-STONER Rifle length upper features a 450 Bushmaster bolt carrier group, parkerized finish, low profile gas block, 16″ barrel, 15″ Ultralight M-LOK handguard and a heavy 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. Supplied without a rear sight, this upper is a great platform for a red dot sight or iron sights (both sold separately).
- 450 Bushmaster Bolt Carrier Group
- 15″ Ultralight M-LOK Handguard
- 16″ 1:24″ Twist Barrel
Cartridge 450 Bushmaster Color Black Finish Anodized Material Aluminum Weight 4.8 Pound Barrel Length 16 Inches Twist 1:24 Inches Threads 5/8″-32 Barrel Contour Heavy Barrel Finish Parkerized Chrome Lined No Gas Block Diameter 0.875 Inches Gas System Length Carbine M4 Feed Ramps No Upper Receiver Type A3 Flat-Top Barrel Material 4150 Chrome Moly Vanadium Steel Handguard 15″ Ultralight M-LOK Bolt Carrier Assembly Included Yes Muzzle Device Flash Hider Country of Origin United States of America Compatible WithAR-15