Ruger Security-9 Magazine 17-round capacity and made of a blued steel alloy.These mags also fit the Ruger Security-9 Security-9 Pro PC Carbine and PC charger with the appropriate adaptor. Factory components factory reliability and consistency.This magazine comes with a flush-fit floorplate installed and an adapter in the box for use in the standard Security-9.Ruger does not recommend using this magazine with a Compact Security-9.17-round capacity9mm CaliberBlued Steel body reliable springRuger Factory partIf you own a Ruger Security-9 pick up some of these magazines as you can never have too many.For use on the range for self-defense for competition or for recreation these factory Ruger mags will feed and function flawlessly. Not compatible with Ruger SR9 or SR9c. Searching for 9mm? Score big savings when you shop our large selection of cheap 9mm ammo for sale.