American Tactical Inc Millsport Upper 300BLK 16" ML – Complete AR-15 Upper Receiver Assembly

The American Tactical Inc Millsport Upper is a complete AR-15 upper receiver assembly chambered in 300 Blackout with a 16-inch barrel and M-LOK compatible handguard. This drop-in upper provides shooters with a reliable platform for subsonic and supersonic 300 BLK ammunition, offering versatility for hunting, home defense, and suppressed shooting applications.

Built on a forged upper receiver with a properly headspaced bolt carrier group, this assembly is compatible with standard mil-spec AR-15 lower receivers. The M-LOK handguard provides modular attachment points for lights, grips, and other accessories. Upper includes bolt carrier group and charging handle for immediate installation.

• Type: Complete AR-15 Upper Receiver Assembly
• Caliber: 300 Blackout
• Barrel Length: 16 inches
• Handguard: M-LOK compatible
• Compatible With: Mil-spec AR-15 lower receivers
• Includes: Bolt carrier group, charging handle
• Use: Hunting, home defense, suppressed shooting