This is a drop-in upper, compatible with virtually any standard AR-15 lower receiver. The upper is fully assembled, headspaced and comes complete with a bolt and bolt carrier assembly. The A3 Flattop upper allows for any optic or iron sight combo desired.
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.
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