Stainless steel construction 15-round capacity Single-stack design Steel wire spring Polymer follower Ergonomic floor plate Compatible with the all-new WaltherA(R) WMPA(R) rimfire pistol, the Walther WMP .22 Magnum 15-Round Magazine is a genuine Walther factory magazine, built around a durable, corrosion-resistant-finished steel body for unwavering strength and reliability. The polymer follower and steel wire spring work in tandem to deliver smooth feeding performance, while the integrated witness window allows for quick visual round counts and inspection while on the move. Better yet, this single-stack rimfire magazine comes equipped with a removable, ergonomic floor plate, designed to integrate seamlessly with your pistol's frame for quick disassembly, and improved comfort and control.