Smith & Wesson M&P 22 Magnum 30 Round .22 WMR Pistol Magazine Black 1 Pack 30RD. Specifications for Smith & Wesson M&P 22 Magnum 30 Round .22 WMR Pistol Magazine: Manufacturer: Smith & Wesson Gun Make: Smith & Wesson Caliber: .22 Winchester Magnum Rimfire Magazine Capacity: 30 Round Color: Black Package Contents: Smith & Wesson M&P 22 Magnum 30 Round .22 WMR Pistol Magazine Smith & Wesson 14054-30RD: M&P 22 Magnum 30 Round .22 WMR Pistol Magazine Black 1 Pack