The ProMag 50-round drum magazine is designed to fit the Ruger SR9, SR9c, PC9mm Carbine, and PCC 9mm platforms, delivering serious capacity and smooth feeding. It’s constructed from proprietary DuPont® Zytel™-based polymer with a blued steel upper magazine tower, an injection-molded follower, and a heat-treated stainless-steel spring for durability and reliability. Proudly made in the USA, this drum is built for long days at the range without constant reloads.