ProMag S&W M&P Shield .40 S&W 6rd Handgun Magazine, Blued Steel - SMI29

ProMag SMI29 is a 6-round detachable magazine chambered in .40 S&W, designed specifically for the Smith & Wesson M&P Shield pistol. Constructed from heat-treated blued steel with ProMag's proprietary TECHNAPOLYMER and anti-fatigue spring technology, allowing the magazine to remain loaded for up to six years without concern. ProMag magazines are manufactured in Phoenix, Arizona and come with a lifetime warranty.