Buy Mossberg 590M Mag Fed Pump Action Shotgun online. For home security, tactical, and competition applications, the 590M pup-action offers many practical advantages such as faster reloading/unloading, increased capacity without additional magazine tube length, and quick and easy transitioning between several types of loads. It features dual extractors, twin action bars, positive steel-to-steel lockup, drilled/tapped receiver, ambidextrous safety, and a heavy-walled barrel. This model has 18.5 barrel, front bead sight, and a 10-round magazine capacity.