Ruger BX-15 17 HMR/22 WMR (22 Mag) Rifle Magazine - 15 Rounds - The BX-15 rifle magazine incorporates technologies that have made the 22 Long Rifle BX-15 and BX-25 magazines famous and also features the same feed lip geometry that has proven reliable in the 9-round, JMX-1 rotary magazine. The stainless-steel feed lips and "constant force" spring combine with a high-lubricity, polyacetal, anti-tilt follower and durable, glass-filled nylon magazine body to make the BX-15 magazine rugged, reliable and easy to clean. The BX-15 is compatible with the Ruger Precision Rimfire chambered in 17 HMR and 22 WMR (22 Mag), Ruger 77/17, Ruger 77/22 and Ruger American Rimfire rifles chambered in 17 HMR and 22 WMR (22 Mag).