TacFire BU-556-10 Upper 5.56 NATO 10″ Barrel BCG Included

Chambered for 5.56x45mm NATO, the TacFire BU-556-10 is a factory-built AR-platform pistol upper designed to be mounted on a compatible lower. It ships complete with a bolt carrier group and is configured for optic installation. The assembly pairs a short 10-inch black nitride barrel with a low-profile M-LOK handguard and a black anodized receiver.

Key Specifications

• The product is listed as a Complete upper assembly.
• The caliber is listed as .223 Rem / 5.56 NATO.
• The barrel measures 10 inches.
• The barrel finish is Black Nitride.
• The receiver is described as 7075-T6 aluminum, black anodized.
• The handguard is listed as M-LOK, black.
• Sight configuration is None; optic ready.
• The package includes a Bolt Carrier Group.
• The listing shows weight as 3.669.

This upper is suited for compact AR pistol builds and applications where a short, maneuverable configuration is preferred. The 10" black nitride barrel and M-LOK handguard provide a practical balance of durability and accessory flexibility, while the included BCG simplifies installation on a compatible lower. For buyers seeking a ready-to-assemble upper that retains the core features of AR-platform components, the TacFire BU-556-10 presents a straightforward, workmanlike option.