The Mossberg 590S Shockwave combines the non-NFA bird-head grip pistol configuration of the original Shockwave with the multi-shell-length capability of the 590S, allowing mini shells, standard 2.75-inch, and 3-inch magnum shells to be cycled reliably in the same compact firearm. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 8 Year introduced: 2021, USA Weight: 5.5 oz Overall length: 26.37" Status: Active Intended use: Home Defense/Novelty