TacFire Complete Upper Features The TacFire Complete Upper pairs a 16 inch 5.56 NATO barrel with a 1:8 inch twist rate a versatile combination that stabilizes both lighter and heavier bullet weights for a broad range of shooting applications. The Black Nitride finish protects the barrel from corrosion and wear while giving it a durable low-maintenance exterior that holds up to repeated range sessions. A 1/2x28 threaded muzzle accepts standard AR-15 muzzle devices and suppressors extending the upper s versatility for both recreational and tactical shooters. As a flat-top AR-15 upper it carries a full-length Picatinny rail standard ready to mount optics right out of the box. The M-LOK handguard finished in Black gives builders a lightweight free-float mounting platform for lights lasers bipods and other accessories without needing proprietary rail sections. This complete upper drops onto any compatible AR-15 lower receiver letting builders configure a rifle around their own stock grip and trigger preferences. Because the upper ships complete rather than stripped there is no need to source and fit a separate barrel bolt carrier group or handguard separately. For AR-15 builders who want a ready-to-run 5.56 upper the TacFire Complete Upper is available for sale at GrabAGun. TacFire Complete Upper Specifications Manufacturer: TacFire Model: Complete Upper Caliber: 5.56 NATO Barrel Length: 16 Barrel Finish: Black Nitride Twist Rate: 1:8 Thread Pattern: 1/2x28 Handguards: M-LOK Handguard Finish: Black Available At: GrabAGun