The Mossberg 590S is engineered to cycle all three standard shell lengths — 1.75-inch mini shells, 2.75-inch standard shells, and 3-inch magnum shells — without adjustment. A unique lifter design accommodates the shorter mini shells that jam conventional actions. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 8 Year introduced: 2021, USA Weight: 7.5 oz Overall length: 39.5" Status: Active Intended use: Tactical/Versatility