Let freedom ring with the ProMag® Smith & Wesson® Shield® 9mm 50-Round Drum Magazine. This high-capacity drum mag features a durable DuPont™ Zytel® polymer drum housing for lasting performance and durability, while the steel upper magazine tower ensures a factory-like fit for optimal performance. Plus, a heat-treated stainless steel wire spring eliminates binding, ensuring the injection-molded polymer follower operates flawlessly for reliable feeding. Made in USA.