For the Ruger 77/17 77/22 WMR and American Rimfire this 9-round 22 WMR/17 HMR magazine is made of Polymer with a steel feed system.Use these magazines for range time hunting small game or pests or for rimfire plinking for fun!Ruger factory original magazines provide consistent feeding and reliability and help your Ruger rimfire platform rifles perform at their best. Ruger 17/77 77/22 22 WMR Magazine9 Round CapacityPolymer BodyYou can never have too many magazines especially for your Ruger small-bore rifles.Helpful for extending range time and making range time more efficient extra magazines help you shoot more without needing to refill empty mags.Order your Ruger JMX-1 magazine online here today!Searching for 22 WRM ammunition? Shop our online selection of cheap .22 WRM rimfire ammo from the top brands you trust