ProMag S&W M&P Shield Magazine .40 S&W Blued Steel 6/rd

ProMag SMI 29 – a 6-round magazine for the Smith & Wesson Shield in .40 caliber. Constructed from heat-treated blued-steel components molded from the Promag proprietary TECHNAPOLYMER and their anti-fatigue spring so you can keep the magazine loaded and ready for up to six years without concern. ProMag magazines are made in Phoenix Arizona and come with a lifetime warranty.