Constructed of blued stainless steel with a polymer floor plate, the ProMag® Smith & Wesson® M&P®22 .22LR 12-Round Magazine delivers factory-like performance at an affordable price. The side loading lever serves as a built-in speed loader for faster, more comfortable reloads, while the chrome silicon wire spring and injection-molded polymer follower ensure smooth, snag-free feeding and reliable operation. Plus, the loading lever channel serves as a built-in witness window for visual round counts at a glance.