This is the ProMag Smith & Wesson M&P 9mm 20-round magazine. 

Upgrade your M&P9’s capacity with this high-quality and affordable magazine from ProMag!

Thanks to the heat-treated steel construction and impact-resistant polymer floorplate, durability will never be a concern. ProMag further enhances the magazine’s toughness by finishing it with a black oxide coating for superior corrosion resistance.

Internally, you’ll find a chrome silicon wire spring and an injection-molded polymer floorplate that keep your M&P9 running flawlessly. And to keep track of your remaining rounds, you’ll find side-facing witness holes for instant capacity checks. 

From home defense to the range, these magazines will have your back! 

Order a few of these 20-round magazines from ProMag before they sell out!