This 10.5a ^2 5.56 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.SPECIFICATIONSCaliber: 5.56mm NATOBarrel Profile: MediumMuzzle Thread: 1/2X28Twist Rate: 1:8Gas System: CarbineMuzzle Device: A2Handguard Length: 9.25 in.Charging Handle: StandardBuffer Tube: Mil-SpecGrip: A2Stock: KAK BraceMagazine: 30 Round MagazineProduct Weight: 7.14 lbs.Country of Origin: U.S.A.