One of the most popular single-stack nines on the market, the Smith & Wesson Shield is only limited by its small magazine capacity, and these aftermarket steel magazines make up for that shortcoming with several different capacity options. Now, M&P Shield owners can train more and carry with increased confidence. The Smith & Wesson M&P Shield steel magazine is designed for use with 9mm models only and have a magazine body made from heat-treated carbon steel. The magazine is treated with a black-oxide finish that combats corrosion and premature wear. Inside each Smith & Wesson M&P Shield steel magazine, you'll find a spring formed from heat-treated chr Mfg: Pro Mag