ONE HORSE 5.56 NATO COMPLETE UPPER RECEIVER W/MEDIUM PISTOL BBL FOR AR-15

Build a compact and highly maneuverable AR platform with this 5.56 NATO complete upper receiver, engineered for reliability, fast handling, and consistent performance in tight spaces. Fully assembled and ready to install, this upper is ideal for AR pistol or SBR configurations.

At the core is a 5.56 NATO barrel paired with a pistol-length gas system, delivering reliable cycling in a compact format. This setup is optimized for shorter builds where responsiveness and maneuverability matter most.

The 7" M-LOK free-float handguard enhances barrel stability for improved accuracy while maintaining a slim, lightweight profile. Its modular design allows for easy attachment of lights, grips, and other accessories without adding unnecessary bulk.

A nitride bolt carrier group ensures smooth, dependable cycling with added corrosion resistance and long-term durability. The full-length Picatinny rail provides a solid mounting platform for optics and sights, making it easy to configure your setup.

Designed to pair with standard mil-spec AR-15 lowers, this complete upper is ready to pin on and run right out of the box.

FEATURES

• 5.56 NATO Barrel – Compact design for close-quarters performance
• Pistol-Length Gas System – Reliable cycling in short-barrel configurations
• M-LOK Free-Float Handguard – Lightweight, modular, and improves accuracy
• Nitride Bolt Carrier Group – Durable, corrosion-resistant, and low maintenance
• Compact & Maneuverable – Ideal for AR pistols and confined environments
• Full-Length Picatinny Rail – Ready for optics and accessories
• Mil-Spec Compatibility – Fits standard AR-15 lower receivers
• Made in USA – Built with quality materials and craftsmanship

WHAT’S INCLUDED

• Complete upper receiver assembly
• 5.56 NATO barrel
• M-LOK free-float handguard
• Nitride bolt carrier group (BCG)
• Charging handle
• Barrel nut and mounting hardware

SPECIFICATIONS

• Caliber: 5.56 NATO
• Gas System: Pistol-Length
• Rail: Picatinny top rail
• Compatibility: Mil-Spec AR-15 lowers
• Country of Origin: USA