Crafted of high-strength polymer, the Smith & Wesson® M&P® 22 Magnum .22 WMR 30-Round Magazine is a genuine Smith & Wesson pistol magazine, engineered to deliver smooth and reliable operation with the all-new M&P 22 Magnum pistol. A high-visibility polymer follower and steel wire spring ensure proper cartridge alignment for jam-free operation, while the impact-resistant floor plate maximizes strength, while simultaneously offering additional grip space for improved comfort and superior weapon control. Better yet, this ultrareliable pistol magazine comes equipped with numbered witness holes for speedy visual round counts.