Designed to deliver hard-hitting firepower and unmatched reliability in defense and field applications, the Smith & Wesson® M&P® 10mm 15-Round Magazine is equipped with precision-machined witness windows for quick visual round counts while on the move. Constructed of durable, heat-treated stainless steel with a high-visibility polymer follower, this is a factory OEM magazine, designed to deliver superior reliability and a precise, wobble-free fit for smooth feeding operation. Better yet, this magazine is equipped with a high-tensile steel spring for jam-free performance, while the removable polymer floor plate allows for quick disassembly when maintenance and cleaning are required.