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 chosen for its combination of strength and heat resistance under sustained firing. A 1:7 twist rate stabilizes a wide range of 5.56 NATO bullet weights from lighter varmint loads to heavier match-grade projectiles giving the shooter versatility across ammunition types. The barrel is threaded at 1/2x28 letting the shooter add a flash hider muzzle brake or suppressor depending on the rifle s intended role. As a complete upper it ships ready to drop onto any compatible mil-spec AR-15 lower simplifying the build process for anyone assembling or upgrading a rifle. An M-LOK handguard surrounds the barrel giving the shooter a full perimeter of mounting slots for lights lasers foregrips and slings without needing separate adapters. That handguard keeps the barrel free-floated which helps maintain accuracy by eliminating contact points that could shift point of impact under stress. The 16 inch barrel length keeps the upper compliant as a rifle-length configuration while still staying maneuverable in most shooting positions. Whether finishing a first build or upgrading an existing rifle the Andro Corp Industries Complete Upper offers a straightforward path to a dependable 5.56 NATO AR-15. Andro Corp AR-15 Complete Upper Specifications Manufacturer: Andro Corp Model: AR-15 Complete Upper Caliber: 5.56 NATO Barrel Length: 16 Barrel Material: Chrome Moly Vanadium Twist Rate: 1:7 Handguard: M-LOK Thread Pattern: 1/2x28 Available At: GrabAGun