TacFire BU9MM4 | 9mm Luger | 4″ Barrel | M-LOK

The TacFire BU9MM4 is a complete 9mm AR-platform pistol upper built around a 4″ black nitride barrel and a 7075-T6 aluminum receiver finished in black anodize. This factory-built assembly ships complete and includes a Bolt Carrier Group, ready to mount on a compatible lower. The M-LOK handguard and optic-ready top rail support modern sighting and accessory options for a streamlined setup.

Product Specifications

• This is a complete pistol upper assembly.
• The caliber is 9mm.
• The barrel length is 4 inches.
• The barrel finish is Black Nitride.
• The barrel length range is 4 to 4.99 inches.
• The handguard type is M-LOK.
• The handguard finish is Black.
• The receiver material is 7075-T6 aluminum.
• The receiver finish is Black Anodized.
• The sights configuration is Optic Ready.
• The assembly includes a Bolt Carrier Group.
• Intended platform is the AR-platform.
• The UPC is 729205520242.

Well-suited for range training and competition, this upper provides a straightforward, factory-complete option for builders and shooters who want a dependable 9mm AR piston-style solution. The combination of corrosion-resistant finishes, a common receiver material, and an included Bolt Carrier Group reduces setup time and simplifies parts sourcing, making this upper a practical choice for performance-minded owners.