Andro Corp AR-15 Complete Upper Features The Andro Corp Industries AR-15 Complete Upper is built around a 16 inch chrome moly vanadium barrel a material known for its strength and durability under sustained firing. The 1:7 twist rate is well suited to stabilizing the heavier bullet weights often used in .300 AAC Blackout loads helping maintain accuracy across a range of ammunition choices. A 1/2x28 threaded muzzle gives shooters the flexibility to add a muzzle brake flash hider or suppressor to manage recoil and signature. Chambered specifically for .300 AAC Blackout this upper lets AR-15 owners add a versatile close-range capable chambering to their existing lower receiver. An M-LOK handguard ships with the upper providing a lightweight and modular mounting surface for lights foregrips slings and other rail-mounted accessories. The Picatinny top rail that comes standard on a complete AR upper gives shooters a reliable surface for mounting optics whether a red dot for close range work or a magnified scope for extended distances. Because the upper is a drop-in complete assembly builders can swap it onto a compatible AR-15 lower without needing to fit individual components. The Andro Corp Industries AR-15 Complete Upper is available for sale at GrabAGun for shooters looking to expand their AR-15 into .300 AAC Blackout. Andro Corp AR-15 Complete Upper Specifications Manufacturer: Andro Corp Model: AR-15 Complete Upper Caliber: .300 AAC Blackout Barrel Length: 16 Barrel Material: Chrome Moly Vanadium Twist: 1:7 Handguards: M-LOK Thread Pattern: 1/2x28 Available At: GrabAGun