Mossberg 590 Retrograde Matte Blued 12 Gauge 3in Pump Action Shotgun - 20in - A throwback to the look of our first tactical pumps, Retrograde models feature a walnut stock with checkered grip and vented recoil pad, and matching forend. Models also include the features that have made Mossberg the choice for millions of users worldwide, including an ambidextrous safety, dual extractors, positive steel-to-steel lockup, twin action bars, and an anti-jam elevator for smooth operation.