Shotguns are popular firearms for a number of good reasons, but one of those reasons is their ability to use a wide range of different types of ammunition. Mossberg keeps this feature at the forefront of their 590S lineup of shotguns. The newly designed elevator allows for these shotguns to cycle 3" shells, 2-3/4" shells, and even the increasingly popular 1.75" shells! The 590S retains the same tried and true features from the 590 series such as dual extractors, twin action bars, positive steel-to-steel lockup, and a top-mounted ambidextrous safety switch. A synthetic stock and forend make this a lightweight but rugged shotgun, and with its 18.5" barrel it's also highly maneuverable. Additionally, this model comes optics ready and accepts direct mounting of Shield RMSc pattern red dot sights. For the ultimate in home defense capability, you need the 590S pump action shotgun from the legendary firearms experts at Mossberg.Mossberg 590S Optics Ready Specifications and FeaturesMossberg Item Number: 51605Pump Action Shotgun12 Gauge18.5" Cylinder Bore Barrel3" Chamber (Also Accepts 1-3/4" and 2-3/4" Shells)Capacity: 5 (3" shells), 6 (2-3/4" shells), 9 (1-3/4" shells)Optics Ready (accepts Shield RMSc pattern optics)Bead Front SightDual ExtractorsTwin Action BarsPositive Steel-to-Steel LockupRedesigned ElevatorTop-Mounted Ambidextrous SafetyBlack Synthetic Stock and ForendLength: 39.5"Weight: 6.75 lbs.Matte Blued Finish