This black oxide alloy steel, 15-round, 9mm Luger Genuine Ruger Factory Magazine is compatible with the 10-round, 9mm Luger Ruger Security-9 Compact Pistol when used with the included polymer magazine adapter. This Genuine Ruger Factory Accessory is made in the USA. Product Specifications Manufacturer: Ruger Model: Security-9 Compact Caliber: 9mm Luger Magazine Capacity: 15-Rounds Other Features: Polymer Magazine Adaptor