HECKLER & KOCH Magazines in .45ACP, .40S&W and 9MM. These magazines come fully loaded and ready to use in your Heckler & Koch pistol. They are constructed of steel for strength, durability and reliability for years of service. The magazine is designed with an easy-to-grip textured polymer for comfort and maximum control when you need it most. Each magazine has a round count that corresponds to the caliber of pistol it’s designed for–so you’ll always know how many rounds remain, making these hard-working HECKLER & KOCH Magazines ideal for personal protection and sport shooting.