This Bushmaster A3 upper assembly will attach to virtually any standard AR-15 lower receiver. Comes complete with charging handle, forward assist, ejection port cover, bolt and bolt carrier assembly. With a 1 in 7" twist, the 16" nitrided barrel provides outstanding accuracy that has been enjoyed by competition shooters worldwide. Pre-ban style upper includes an AAC Blackout Flash Hider.
- Upper Receiver: A3 Flat-Top
- Barrel Length: 16"
- Barrel Contour: Medium
- Barrel Material: 4150 Chrome Moly Steel
- Muzzle Thread Pattern: 5/8"-24
- Chrome Lined: No
- Barrel Finish: Salt Bath Nitride
- Twist Rate: 1 in 7"
- Chamber: 300 Blackout
- M4 Feed Ramps: Yes
- Muzzle Device: AAC Blackout Flash Hider
- Gas System Length: Pistol
- Gas Block Diameter: 0.750"
- Handguard: Quad rail free float
- Sights: None
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: Commercial
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.