The TacFire BU-300-10 Pistol Upper Assembly in 300 Blackout is a complete AR-platform upper designed to drop onto your compatible lower and get you shooting quickly. Built around a 10" black nitride barrel and a black anodized 7075-T6 aluminum receiver, it features a free-floating M-LOK handguard and ships with a bolt carrier group installed for a true ready-to-use package.

This optic-ready upper offers a compact barrel length that balances maneuverability with effective 300 Blackout performance, making it well suited for range use, training, and general-purpose shooting where a shorter configuration is preferred. The M-LOK handguard provides ample mounting space for lights, grips, and other accessories, while TacFire’s attention to machining and finish helps ensure consistent reliability and long-term durability.

• Manufacturer: TacFire
• Model: BU-300-10 Pistol Upper Assembly
• Caliber: 300 Blackout / .300 AAC Blackout
• Barrel Length: 10"
• Type: Complete AR-Platform Upper
• Sights: None, Optic Ready
• Receiver Material: 7075-T6 Aluminum
• Receiver Finish: Black Anodized
• Handguard: M-LOK Free-Float
• Barrel Finish: Black Nitride
• Muzzle: A2 Flash Hider