This genuine Ruger factory magazine with Ruger logo has been tested and has proven to feed as reliably as the standard 10-round Ruger rotary magazine. BX-25 magazines will work with any factory original Ruger 10/22 rifle, SR-22 rifle, and 22 Charger pistol. This magazine includes a polymer body and magazine follower. The steel feeding lips are designed for thousands of rounds - without any noticeable wear- meaning a you can shoot all you want. Keep a few spare mags in your kit; extra magazines save precious time at the range. Never be without a ready to shoot hi cap magazine at hand!