The Sturm Ruger Company has a search page on their website at Ruger.com/retailer/find.html that allows you to find a retailer near you that sells Ruger products. SR22 magazines are sold at most Ruger retailers. SR22 magazines can also be purchased online via Brownells' website at Brownells.com/magazines/index.htm
The Ruger SR22 is a semi-automatic pistol chambered in .22 LR (Long Rifle). The standard magazine of the Ruger SR22 can hold a maximum of 10 rounds. SR22 magazine bumpers are also available on Brownells' website at Brownells.com/magazines/index.htm. Magazine bumpers increase the length of the SR22 magazine, allowing the magazine to hold a maximum of 15 rounds.