The TacFire BU-556-7 Pistol Upper Assembly brings a compact AR-15 configuration together in a ready-to-run package. Built around a 7" 5.56x45mm NATO barrel with a black nitride finish, this complete upper pairs a black anodized 7075-T6 aluminum receiver with a free-float M-LOK handguard and an A2 flash hider for a clean, modern profile. The assembly ships with a bolt carrier group installed and is optic ready with a full-length Picatinny top rail.

This upper is ideal for building a pistol-length AR suited to range use, training, and general-purpose shooting where a shorter, maneuverable platform is preferred. Simply pin it to any compatible AR-15 lower to create a compact setup without additional gunsmithing. TacFire’s attention to machining, materials, and fitment provides dependable performance and solid value for builders looking for a straightforward complete upper.

• Manufacturer: TacFire
• Model: BU-556-7 Pistol Upper Assembly
• Caliber: 5.56x45mm NATO / .223 Rem
• Barrel Length: 7"
• Action: .223 REM/5.56 NATO upper assembly
• Finish Color: Black Anodized Receiver / Black Nitride Barrel
• Unique Features: Complete upper with bolt carrier group, free-float M-LOK handguard, A2 flash hider, optic-ready top rail
• Weight: 3.66 lbs (shipping weight)