American Tactical Inc Millsport Upper 5.56mm 16" M-LOK – Complete AR-15 Upper Receiver Assembly

The American Tactical Inc Millsport upper receiver assembly is a complete drop-in 5.56mm upper for AR-15 platform rifles. This factory-assembled upper features a 16-inch barrel with a carbine-length gas system and an M-LOK compatible handguard for accessory mounting. The assembly arrives ready to mate with any mil-spec AR-15 lower receiver.

Built with a forged upper receiver, the Millsport includes a bolt carrier group and charging handle. The M-LOK handguard provides multiple attachment points for lights, grips, and other accessories while maintaining a slim profile. Compatible with standard AR-15/M16 magazines and lower receivers chambered in 5.56mm NATO or .223 Remington.

• Type: Complete AR-15 upper receiver assembly
• Caliber: 5.56mm NATO
• Barrel Length: 16 inches
• Gas System: Carbine-length
• Handguard: M-LOK compatible free-float
• Includes: Bolt carrier group, charging handle
• Compatibility: Mil-spec AR-15 lower receivers