ONCE HORSE OH-15 300 BLACKOUT SEMI-AUTO AR PISTOL W/KAK BRACE This 10.5" .300 BLK AR pistol is built for reliability, maneuverability, and hard use when it counts. Whether you're running drills at the range, setting up a home defense platform, or building out a compact tactical rig, the OH-15 delivers consistent performance with smooth cycling and dependable accuracy. Compact. Capable. Ready. Range. Home. Tactical. One pistol that gets the job done-every time. Every One Horse firearm and component is made in America with uncompromising standards. We use U.S.-sourced materials, U.S. manufacturing, and strict quality control at e Mfg: One Horse