Heckler and Koch 50248618: The HK USP .45 ACP 12-Round Magazine with Finger Rest is a genuine HK centerfire pistol magazine, designed to deliver reliable firepower in personal defense and target shooting applications. Trusted by civilian and government shooters alike, this genuine HK factory pistol magazine features a durable, nitride-coated stainless steel body for lasting corrosion resistance and reliability. The steel internal spring, coupled with the anti-tilt polymer follower, eliminates binding to ensure reliable feeding.