The TacFire Pistol Upper Assembly is an ultra-compact 5.56x45mm NATO solution for the AR-Platform. It features a 5 4150 Chrome Moly Vanadium steel barrel with a black nitride finish and a standard 1/2x28 threaded A2 flash hider. Built on a forged 7075-T6 aluminum receiver with a black anodized finish, this plug-and-play unit includes a micro M-LOK free-float handguard for modular accessory mounting. This complete assembly ships with a bolt carrier group and charging handle, providing a fully built upper ready to be pinned onto a compatible pistol or SBR lower. Note: Due to the extremely short 5-inch barrel length, this upper is optimized for maximum maneuverability in close-quarters environments.