MagPump Magazine Retainer 9mm Double Stack Magazines Smith & Wesson Black MR-S&W. Pumping stronger than anyone else the MagPump is a lightweight device that secures your magazine and feeds ammunition with ease speeding up your reloads. These Speed Loaders from the specialists at MagPump also save your arm as friction causes energy consumption which is why you only need a portion of the pump activated to load ammo. However don't forget to grab your pump action magazine loader if you need one for competitive shooting hunting or any other shooting sports where magazine loaders are essential. Purchase any of the MagPump model 9mm products for yourself or a gift for a fellow shooter. Specifications for MagPump Smith & Wesson 5906 9mm Double Stack Magazine Retainer: Manufacturer: MagPump Caliber: 9mm Luger Gun Make: Smith & Wesson Gun Model: Smith & Wesson Model 5906 Country of Origin: USA Package Contents: MagPump Smith & Wesson 5906 9mm Double Stack Magazine Retainer MagPump MR-S&W 5906 : Magazine Retainer 9mm Double Stack Magazines Smith & Wesson 5906 Black