Compatible with the Smith & Wesson M&P Shield Plus™ and the all-new Smith & Wesson Equalizer pistol, the Smith & Wesson M&P Shield™ Plus, Equalizer™ 9mm 15-Round Magazine maximizes your firepower potential, without sacrificing concealability, reliability, or control in fast-action environments. Featuring a proprietary single-to-double-stack design, the precision-machined steel body comes equipped with an extended polymer floor plate with a durable polymer finger extension for improved comfort and control, while the corrosion-resistant black finish repels water, dirt, and debris for enhanced reliability and consistent operation in virtually any target-rich environment. The high-tensile steel spring and polymer follower ensure smooth, reliable feeding, while numbered witness holes allow quick, visual round counts in fast-action personal defense applications.