Standard Manufacturing's SKO Mini proudly made in the USA offers superior firepower due to its fast semi-auto action and quick interchange magazines. It possesses the most reliable gas operated system available with smooth and flawless operation across a variety of loads. And even has bolt hold open after last round. - Classified as an other firearm by the ATF the SKO Mini is the smallest firearm of its kind on the market. It offers superior reliability because it is built on the time proven SKO and SKO Shorty platform. - Machined from 7075 aircraft grade aluminum with the latest technology in CNC machining then Mil-Spec hard anodized the SKO Mini is both lightweight and durable. Internal components are salt bath nitride coated for optimum lubricity. - Notable features include an ambidextrous safety familiar AR-style controls for an easy transition to this platform and a threaded muzzle to accept a variety of choke tubes door breachers and accessories. The length is 27 and has a 14 3/4 barrel made from 4140 steel that accepts both 2