ProMag SMI31 S&W M&P Shield .40 S&W 9rd Handgun Magazine, Blued Steel - SMI31

The ProMag SMI31 is a 9-round detachable magazine chambered in .40 S&W, specifically designed to fit the Smith & Wesson M&P Shield pistol. Constructed from heat-treated blued steel with ProMag's proprietary TECHNAPOLYMER and anti-fatigue spring, allowing the magazine to remain loaded and ready for up to six years without concern. Made in Phoenix, Arizona and backed by a lifetime warranty.