One Horse OH-15 | .300 BLK | 10.5″ Barrel | 30rd

The One Horse OH-15 is a compact AR-pattern pistol chambered in .300 BLK with a 10.5″ barrel and a KAK brace. It pairs compact handling with AR-style ergonomics and a 30-round magazine for extended range sessions. For this platform an optic like the Vortex Viper PST 1-6x (priced under $1,000) provides a durable, low-power variable option that covers close to mid-range engagements effectively.

Recommended uses include precision short-range target work and carbine-style competition or drill practice.

Product Specifications

• The caliber is .300 BLK.
• The barrel measures 10.5 inches for compact handling.
• The barrel profile is Medium.
• The muzzle threads are 5/8X24.
• The rifling twist rate is 1:8.
• The gas system is a Carbine length system.
• The installed muzzle device is an A2 style device.
• The handguard length is 9.25 inches and features M-LOK compatibility.
• The charging handle is a Standard AR-style charging handle.
• The buffer tube is Mil-Spec.
• The grip is an A2 style grip.
• The brace/stock is a KAK Brace.
• The firearm ships with a 30-round magazine.
• The listed product weight is 7.14 lbs..
• The UPC is 850078799807.

The OH-15 is built for users who want a compact AR-platform pistol that preserves familiar ergonomics while reducing overall length and improving maneuverability. Its .300 BLK chambering and 10.5″ barrel make it well-suited to short-range precision practice and carbine-style competition; paired with a low-power variable optic it can be a versatile range tool. Construction and component choices emphasize straightforward reliability and easy maintenance.