Constructed of stainless steel for exceptional strength and natural corrosion resistance, the Smith & Wesson® Model 5900 Series Full Size 9mm 15-Round Magazine is a genuine factory mag designed to deliver smooth and consistent feeding performance when it matters most. The injection-molded polymer follower and steel wire spring deliver smooth feeding operation, while the precision-engineered magazine catch and reinforced feed lips ensure a snug, wobble-free fit for improved reliability. Machined witness holes allow for quick, visual round counts, and the shock-resistant polymer floor plate is easily removed when maintenance and cleaning are required. What are you waiting for? Pick up a few spare S&W mags today!