HARTS 16″ AR-15 Complete Upper Receiver | 5.56 & .300 Blackout

HARTS 16" AR-15 Complete Upper Receiver

Complete a general-purpose AR-15 build with a 16-inch HARTS Complete Upper Receiver. Available in 5.56 NATO / .223 and .300 Blackout, this assembled upper combines a forged receiver, 1:7-twist barrel, and 15-inch free-float M-LOK handguard in a practical full-length configuration.

The handguard provides multiple M-LOK mounting positions, while the continuous Picatinny top rail provides space for compatible iron sights, red dots, scopes, and magnifiers. Choose black, green, red, or silver to coordinate the upper with the rest of your build.

Available Configurations

• Barrel: 16 inches with a 1:7 twist rate
• Caliber: 5.56 NATO / .223 or .300 Blackout
• Colors: Black, green, red, and silver

Key Features

• Forged AR-15 upper receiver
• 15-inch free-float M-LOK handguard
• Full-length Picatinny top rail
• Low-profile gas block
• HARTS charging handle
• Forward assist and ejection-port cover

What Is Included

The selected configuration includes the assembled upper receiver and installed handguard. Review the selected product option before ordering to confirm caliber, color, and BCG inclusion.

Compatibility

Designed for standard mil-spec AR-15 lower receivers. Confirm ammunition, BCG, muzzle-device, and lower-receiver compatibility for the selected caliber before assembly or use.