Specifically designed for concealed-carry applications, the Smith & Wesson® Model 4000 Series Compact .40 S&W 7-Round Magazine is a genuine Smith & Wesson single-stack pistol magazine, engineered to deliver exceptionally smooth feeding performance and jam-free operation with your Smith & Wesson Model 4000 Series Compact semi-auto pistol (not included). This centerfire pistol magazine features a durable stainless steel body with a corrosion-resistant blued finish and flush-fit profile for snag-free carry, while numbered witness holes offer quick visual round counts for added reliability. The high-tensile steel spring and polymer follower ensure smooth, reliable feeding, and the precision-engineered design provides a snug, wobble-free fit for improved field service. Plus, the removable polymer floor plate offers improved shock resistance and quick disassembly when required.