Smith & Wesson Magazine, 9MM, 23 Rounds, Black, w/Adapter, Fits S&W M&P 30156917 Specifically designed for use with the Smith & Wesson M&P FPC pistol-caliber carbine the Smith & Wesson M&P9 9mm 23-Round Magazine with Adapter is a genuine S&W factory magazine" designed to deliver exceptional service and consistent operation in any target shooting or training application.