The One Horse OH 16 5.56 NATO Complete Upper Receiver delivers a straightforward, dependable AR-15 upper built around a 16-inch 5.56 NATO barrel and a 15-inch free-float M-Lok handguard. The nitride bolt carrier group and included charging handle arrive fully assembled, while the full-length Picatinny rail offers generous space for optics and backup sights. A SOCOM-profile barrel, mid-length gas system, and A2 muzzle device work together to provide smooth cycling and consistent accuracy in a clean, uncluttered package.

This complete upper is ready to pin onto any Mil-Spec AR-15 lower, making it a practical choice for building a new rifle or refreshing an older setup. The extended M-Lok handguard supports lights, grips, and other accessories without contacting the barrel, helping maintain repeatable point of impact during extended range sessions or training days. With its balanced feature set and focus on reliability, this One Horse upper offers a solid foundation from a manufacturer known for straightforward, American-made rifle components.

Key Features:

• Manufacturer: One Horse
• Model: OH 16 5.56 NATO Complete Upper Receiver
• Caliber: 5.56 NATO
• Barrel Length: 16 in.
• Handguard: 15 in. M-Lok free-float
• Gas System: Mid-length
• Muzzle Device: A2
• Bolt Carrier Group: Nitride, included
• Charging Handle: Included
• Upper Rail: Full-length Picatinny