The TacFire Complete Upper with BCG (brand part no. BU3008) is chambered in .300 AAC Blackout with an 8-inch barrel, giving pistol builders a ready-to-install upper for a short, maneuverable platform. The barrel uses a 1:8 twist rate to stabilize a wide range of .300 Blackout bullet weights, paired with an 8-inch free float handguard for a slim profile and improved barrel harmonics. A pistol-length gas system, 5/8×24 threaded muzzle with an A2-style muzzle device, and black finish round out the build, and the upper ships complete with a bolt carrier group ready to drop onto a compatible lower.

Key Specifications

• Chambered in .300 AAC Blackout with an 8-inch barrel.
• Rifled at a 1:8 twist rate to stabilize a wide range of bullet weights.
• Fitted with an 8-inch free float handguard for a slim, rigid profile.
• Runs a pistol-length gas system matched to the short barrel.
• Threaded 5/8×24 with an A2-style muzzle device.
• Finished in black and includes a complete bolt carrier group.
• Weighs approximately 3.55 lb as shipped.

Frequently Asked Questions

Does this upper include a bolt carrier group? Yes, it ships as a complete upper with BCG installed.

What is the twist rate on this barrel? 1:8, suited to a wide range of .300 Blackout bullet weights.

Buy the TacFire Complete Upper with BCG

Drop a complete .300 Blackout upper onto your build with TacFire. Browse our full lineup of AR-15 uppers and order from our Lubbock, Texas gun shop for fast, insured shipping.