TacFire AR-15 Complete Upper Features The TacFire Complete Upper is chambered in .300 AAC Blackout and built around a 5 barrel finished in black nitride giving the builder both corrosion resistance and a durable working surface for repeated firing. The short barrel length is purpose matched to .300 Blackout s ability to perform well even out of very short barrels making this upper well suited to compact AR pistol or SBR builds where overall length matters. A 5/8x24 threaded muzzle capped with an A2 flash hider gives the shooter a period-correct look while still allowing the addition of a suppressor or different muzzle device down the road. Because the upper ships as a complete assembly with the bolt carrier group already installed the builder can mount it directly to a compatible lower without sourcing or fitting additional internal parts. Constructed from steel and aluminum this upper is built to standard AR-15 pattern dimensions so it drops onto any compliant lower without requiring proprietary components. This compatibility gives builders flexibility to pair the upper with whichever lower stock or brace configuration suits their intended use whether that is a home defense pistol or a dedicated short-barrel rifle build. The combination of a short hard-hitting .300 Blackout barrel and a factory-installed BCG saves significant assembly time compared to piecing together individual components. For shooters looking to add a compact .300 Blackout upper to their parts inventory the TacFire Complete Upper offers a straightforward ready-to-run solution. TacFire AR-15 Complete Upper Specifications Manufacturer: TacFire Caliber: .300 AAC Blackout Barrel Length: 5 Barrel Finish: Black Nitride Muzzle Device: A2 Flash Hider Includes: Bolt Carrier Group Thread Pattern: 5/8x24 Material: Steel Aluminum Color: Black Upper Type: Complete Available At: GrabAGun