Enjoy the sweet smell of gunpowder and the sound of All-American freedom with the Promag® Smith & Wesson® M&P9® 9mm 50-Round Drum Magazine. This ultra-reliable drum magazine features a durable, corrosion-resistant DuPont® Zytel™ polymer body with a blued steel magazine tower, precision-engineered for a flawless fit for smooth, reliable operation. The heat-treated chrome silicon wire spring and injection-molded polymer follower ensure smooth, reliable operation. Better yet, this American-made, aftermarket drum magazine is backed by a lifetime warranty for unmatched reliability—no matter where you are. Made in USA.