The TacFire Pistol Upper Assembly is an ultra-compact 300 Blackout solution for the AR-Platform. It features a 5 4150 Chrome Moly Steel barrel with a black nitride finish and a standard 5/8x24 threaded A2 flash hider. Built on a forged 7075-T6 aluminum receiver with a black anodized finish, this plug-and-play unit is expertly designed for maximal functionality in close-quarters environments. This complete assembly includes a specialized 300 Blackout bolt carrier group and charging handle, providing a fully built upper ready to be pinned onto a compatible pistol or SBR lower receiver. Note: The 5-inch barrel length and 5/8x24 thread pattern make this upper an ideal candidate for suppression, particularly when running heavy subsonic .300 Blackout projectiles.