- A2 Upper Receiver
- Chrome lined 1:9" twist barrel
- Threaded Barrel with A2 Flash Hider
- Two Piece Handguard
The Bushmaster AR-15 Pistol A2 Upper Receiver Assembly is chambered in 5.56x45mm NATO and features an 11.5" heavy contoured steel barrel. The Bushmaster A2 Upper Receiver includes a charging handle, bolt carrier assembly, and a threaded muzzle with flash hider. The Bushmaster is also comes compete with an integral A2 rear sight and carrying handle. The Bushmaster AR-15 Pistol A2 Upper Receiver is factory headspaced, proofed, test fired and ready to use.