ProMag Magazine for Smith and Wesson M&P Shield EZ Features The ProMag magazine for the M&P Shield EZ extends capacity to 12 rounds of 9mm giving shooters more rounds on tap than the factory magazine without changing the pistol s easy-to-rack operation. The steel magazine body is heat treated before finishing adding strength that helps the feed lips resist deformation from repeated loading and unloading cycles over years of use. A black oxide finish resists corrosion during storage and carry keeping the magazine functional even after extended time in a range bag or holster pouch. This combination of material choice and finish makes the magazine a durable option for range use backup carry or duty rotation. Inside the body an injection molded follower rides smoothly along the feed lips to ensure the top round presents consistently for reliable chambering shot after shot. The magazine spring is formed from heat-treated chrome silicone wire a material chosen specifically for its ability to maintain consistent tension across thousands of loading cycles without weakening. Manufacturing in the USA ties the magazine to ProMag s established quality control standards for fit and function. For M&P Shield EZ owners looking to add capacity to their pistol s magazine lineup this ProMag magazine offers a dependable made-in-USA option. Pro Mag Industries Magazine for M&P Shield EZ Specifications Brand: ProMag Caliber: 9mm Compatible Hosts: Smith and Wesson M&P Shield EZ Capacity: 12 Rounds Material: Steel Finish: Blued Available At: GrabAGun