Olympic Arms AR-15 A2 Upper Receiver Assembly 223 Remington 20" Barrel
- Upper Receiver Type: A2 Upper
- Barrel Length: 20"
- Barrel Contour: Not listed by manufacturer
- Barrel Material: 4140 Chrome Moly Steel
- Muzzle Thread Pattern: 1/2"-28
- Chrome Lined: No
- Barrel Finish: Black Matte
- Twist Rate: 1 in 9"
- Chamber: 5.56x45mm NATO
- M4 Feed Ramps: Yes
- Muzzle Device: A2 Flash Suppressor
- Gas System Length: Rifle
- Gas Block Diameter: .750"
- Handguard: M4 Polymer Handguards
- Sights: A2 Front Sight, Adjustable A2 Rear Sight
- 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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