TacFire Complete Upper Features The TacFire Complete Upper is built around an 8 barrel chambered in .300 AAC Blackout a short-barrel length that keeps the overall package compact while the 1:8 twist rate stabilizes the heavier subsonic bullets the cartridge is known for. A pistol length gas system matches the short barrel cycling the action reliably across a range of .300 AAC Blackout loads. The 8 free float handguard isolates the barrel from sling and grip pressure helping maintain consistent accuracy shot to shot. The muzzle is threaded 5/8x24 and fitted with an A2 style muzzle device giving the end user a factory-installed option that can be swapped for a compensator or suppressor adapter. Finished in a durable black coating over steel and aluminum construction this complete upper is built to bolt directly onto a compatible AR-15 lower without additional machining. Because it ships complete with barrel handguard gas system and bolt carrier group it drops straight onto a stripped lower to finish a pistol or SBR build. The free float design also provides mounting space along the handguard for lights lasers or foregrips as the build calls for it. This upper gives builders and retailers alike a ready-to-assemble option for compact .300 AAC Blackout platforms for sale at GrabAGun. TacFire Complete Upper Specifications Manufacturer: TacFire Model: Complete Upper Caliber: .300 AAC Blackout Barrel Length: 8 Twist Rate: 1:8 Gas System: Pistol Length Handguard: 8 Free Float Muzzle Device: A2 Style Thread Pattern: 5/8x24 Color: Black Material: Steel Aluminum Available At: GrabAGun