The TacFire BU-300-10 Pistol Upper Assembly delivers a complete AR-platform upper chambered in 300 AAC Blackout, featuring a 10-inch black nitride barrel and a black anodized 7075-T6 aluminum receiver that combines rugged durability with precise fit and finish. This complete upper includes a reliable bolt carrier group and a versatile M-LOK handguard, offering clean accessory mounting and dependable performance for prone, range, or field use. With optic-ready capabilities and no fixed sights, it provides flexibility for aligning your preferred optics setup while maintaining a compact profile ideal for pistol-caliber builds. The 10-inch length strikes a balance between maneuverability and velocity, enabling effective close-quarters engagement and controlled accuracy at practical distances, while the black nitride barrel finish ensures corrosion resistance and smooth, consistent bore performance. TacFires engineering emphasizes reliable cycling and consistent chamber pressures in 300 Blackout, enabling suppressed or unsuppressed operation with reduced recoil signature. This upper assembly is designed to integrate smoothly with standard AR receivers, delivering a turnkey solution for shooters seeking a capable, ready-to-configure 300 Blackout platform for hunting, sport shooting, or tactical applications.