MidwayUSA is proud to offer this AR-STONER A3 Upper Receiver Assembly in 450 Bushmaster at an exceptional price! This AR-STONER Rifle length upper features a 450 Bushmaster bolt carrier group, parkerized finish, low profile gas block, 18" barrel, 15" 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" M-LOK Handguard
- 18" 1:24" Twist Barrel