Description S&W M&P 9 Shield Plus 9mm 10 round Magazine. Factory new magazine for your Smith & Wesson M&P 9 Shield Plus. These high quality factory original magazines are a must have for you Smith and Wesson Shield Plus. Made of high quality materials and to Smith & Wessonâs exacting standards. Use these as extra backup mags for concealed carry, or just to have more mags at range. More magazines equal less time reloading!