TacFire BU-300-10 AR Upper .300 Blackout 10″ Barrel

The TacFire BU-300-10 is a complete AR-platform upper assembly chambered for .300 AAC Blackout with a 10" black nitride barrel. It ships ready to install on a compatible lower and includes a bolt carrier group. The receiver is machined from 7075-T6 aluminum with a black anodized finish and is paired with an M-LOK handguard.

Key Specifications

• Chambering is .300 AAC Blackout for compatibility with AR-platform .300 Blackout builds.
• The barrel measures 10" and features a black nitride finish.
• The barrel finish is Black Nitride for increased surface hardness and corrosion resistance.
• The receiver material is 7075-T6 aluminum with a black anodized finish.
• The handguard style is M-LOK and is finished in black.
• Sight provision is listed as None, Optic Ready.
• This upper includes a Bolt Carrier Group as supplied.
• The product is classified as a Complete upper assembly.
• The listed weight is 3.95.

This TacFire BU-300-10 upper offers a compact, ready-to-install solution for builders seeking .300 Blackout capability in a short-barrel AR-platform pistol or SBR project. Its 10" black nitride barrel, anodized 7075-T6 receiver and M-LOK handguard provide a practical balance of durability and modularity, making it suitable for suppressed use and close-range precision setups when configured correctly.