The TacFire SSBU55610 5.56 NATO Black Nitride complete upper brings a compact AR-15 configuration together with a 10.5" 5.56 NATO barrel and free-float M-LOK handguard. Built around TacFire’s proven upper receiver, it pairs a 1:8 twist 4150 chrome moly steel barrel with a black nitride finish to enhance durability and corrosion resistance while maintaining smooth, reliable performance.

This upper is well suited for building a compact range rifle or training carbine where maneuverability and modern accessory mounting are priorities. The 10" M-LOK handguard offers generous space for lights, grips, and other accessories, while the 1/2x28 threaded muzzle is ready for your preferred flash hider or suppressor-ready device. It’s an excellent option for shooters who want a quality AR-15 upper assembly backed by TacFire’s reputation for practical, hard-use components.

• Manufacturer: TacFire
• Model: SSBU55610
• Caliber: 5.56 NATO
• Action: .223 REM/5.56 NATO
• Barrel Length: 10.5"
• Rate Of Twist: 1:8"
• Handguard Type: M-LOK Free-Float
• Barrel Finish: Black Nitride
• Threaded Barrel: 1/2x28
• Weight: 1.8 lbs (assembly)