- Upper Receiver Type: A3 Flat-Top
- Barrel Length: 20" Fluted
- Barrel Contour: Not listed by manufacturer
- Barrel Material: Stainless Steel
- Muzzle Thread Pattern: N/A-Crowned
- Chrome Lined: No
- Barrel Finish: Stainless
- Twist Rate: 1 in 9"
- Chamber: 223 Remington
- M4 Feed Ramps: Yes
- Muzzle Device: N/A
- Gas System Length: Rifle
- Gas Block Diameter: .750"
- Handguard: 1- Piece Free Float
- Sights: None-Includes Picatinny Rail Gas Block
- 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.