The One Horse OH-15 (part no. OH-OP01) is a complete 5.56mm NATO AR pistol built for reliability, maneuverability, and hard use, whether you’re running drills at the range, setting up a home defense platform, or building out a compact tactical rig. The 10.5-inch medium-profile barrel and 9.25-inch M-LOK handguard keep the package tight while the KAK brace delivers a stable, ready-to-run shooting platform.

Key Specifications

• Chambered in 5.56mm NATO for broad ammunition availability.
• Features a 10.5-inch medium-profile barrel with a 1:8 twist rate.
• Threaded 1/2×28 and fitted with an A2 muzzle device.
• Runs a carbine-length gas system for reliable cycling.
• Fitted with a 9.25-inch M-LOK handguard for a full-length accessory surface.
• Ships with a 30-round magazine for full standing capacity.
• Equipped with a KAK brace and standard mil-spec buffer tube.
• Uses a standard charging handle and A2 pistol grip.
• The barrel is machined from 4150 steel for durability under sustained use.

Frequently Asked Questions

What caliber is the OH-15 chambered in? 5.56mm NATO.

What is the twist rate? 1:8.

What brace does it use? A KAK brace.

Buy the One Horse OH-15 5.56mm Pistol

Compact, capable, and ready for hard use, the One Horse OH-15 stands out in our AR pistols lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.