AR-57 Upper Assembly 5.7 X 28 16″ Barrel

AR-57 Upper Assembly Features

The AR-57 Upper Assembly combines functionality with advanced material technology. The 16″ barrel, finished in black melonite, offers exceptional durability and corrosion resistance, while the 1:9 twist rate is tailored for the 5.7x28mm cartridge, ensuring accurate and stable projectile flight. The assembly’s bolt carrier, buffer tube, and flash hider, all crafted from 8620 steel alloy, also receive a black melonite treatment, enhancing the overall resilience and longevity of the components.

Ergonomically designed for performance, this upper assembly features a forged 7075 T6 monobloc aluminum construction, providing a sturdy yet lightweight platform. The integration of a radial muzzle brake not only reduces recoil but also minimizes muzzle rise, allowing for quicker follow-up shots and improved accuracy. The AR-57 Upper Assembly is drilled and tapped, ready for customization with optics or other accessories to suit the shooter’s preferences.

AR-57 Upper Assembly Specifications

• Caliber: 5.7x28mm
• Barrel Length: 16″
• Twist Rate: 1:9
• Finish: Black Melonite
• Frame Material: 7075 T6 Monobloc Aluminum
• Bolt Carrier Material: 8620 Steel Alloy
• Sights: None
• Muzzle: Radial Muzzle Brake
• Additional Features: Black Melonite Treatment on Bolt Carrier, Buffer Tube, and Flash Hider