- Upper Receiver Type: Forged Flat Top A3
- Barrel Length: 20 "
- Barrel Contour: HBAR
- Barrel Material: 416 Stainless Steel
- Muzzle Thread Pattern: 1/2 x 28 TPI
- Chrome Lined: No
- Barrel Finish: Bead Blasted Stainless
- Twist Rate: 1 in 9"
- Chamber: 5.56 NATO
- M4 Feed Ramps: Yes
- Muzzle Device: AAC Blackout
- Gas System Length: Rifle
- Gas Block Diameter: .750"
- Handguard: DPMS M111 Modular
- 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.