The Sig SauerP320 9mm 30-Round Extended Magazine is a genuine Sig Sauer factory OEM magazine, designed to deliver consistent field performance and jam-free operation in high-stress tactical scenarios and volume target shooting applications. This 30-round magazine features a durable, nitride-coated steel body with a high-lubricity finish for smooth operation and dependable feeding performance, while factory-drilled and numbered witness holes for quick, visual round counts while on the move. The high-tensile steel spring and heat-treated, anti-tilt polymer follower work together to ensure smooth, reliable feeding, and the removable floor plate makes for quick disassembly when cleaning and maintenance are required. Plus, this centerfire pistol magazine comes equipped with a removable polymer sleeve for improved comfort and reliability.