Mossberg 51601 590S Shockwave 12 Gauge 8+1(1.75 in) 5+1(2.75 in) 4+1(3 in) 3 in Chamber, 14.375 in Barrel, Matte Blued Metal Finish, Corncob Forend w/Strap, Dual Extractors, Raptor Birdshead Grip Stock

Overview

The Mossberg 590S Shockwave is a pump-action 12-gauge firearm featuring a 14.375-inch barrel and a matte blued metal finish. Designed for shooting flexibility, it cycles 1.75-inch, 2.75-inch, or 3-inch shells interchangeably—allowing users to load individual lengths or mix shell types simultaneously without requiring a mini-shell adapter. Built with standard Mossberg pump-action mechanics, the platform incorporates dual extractors, twin action bars, positive steel-to-steel lockup, an anti-jam elevator, a redesigned bolt slide, and an energy-absorbing bumper. Additional features include a top-mounted ambidextrous safety, a magazine clean-out tube with cap, a logo-engraved receiver, a corncob forend with a strap, and a Raptor birdshead grip stock.

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