The Colt Defender 9mm Stainless Steel Magazine is a factory OEM single-stack magazine engineered for reliable feeding in Colt's compact 1911-platform pistols. It is compatible with Colt Defender, New Agent, and Officer models, making it a direct drop-in replacement with no modifications required. Constructed from stainless steel, it delivers excellent corrosion resistance against moisture, sweat, and environmental exposure — ideal for everyday carry use. The flat base pad maintains the compact profile essential to concealed carry and holster compatibility. This retail-packaged version ships ready for immediate use as a spare or replacement magazine. Colt Defender 9mm 9rd SS 1911 Magazine (Retail Packaged) SP300100-RP