Mossberg Shockwave 20-gauge firearm
The 20-Gauge Mossberg Shockwave
(Photo by Mossberg)

A 20-gauge version of the Mossberg Shockwave? Sure, why not? The more choices customers have when it comes to this immensely popular pump-action firearm, the better. Like its bigger brother, the newer Mossberg Shockwave model features a 14-inch barrel, “birds head” pistol grip and an overall length of 26.4 inches, meaning it doesn’t fall under the purview of the NFA and doesn’t require any added paperwork or a tax stamp for transfers.

The Mossberg Shockwave 20 Gauge

But this version of the Mossberg Shockwave required an “engineering redesign” in order to accommodate a smaller gauge, the company says. It has a scaled-down receiver, and the cob-styled, tactical forend was reduced in overall size. The gun weighs in at 4.9 pounds, as opposed to the 5.25-pound 12-gauge model.

This 20-gauge is 2 ¾ and 3-inch capable with a 6-round capacity and includes a heavy-walled barrel with a bead sight and matte blue finish. The aforementioned “birds head” Raptor pistol grip is made by Shockwave Technologies. The grip boasts an enhanced textured finish, which allows for maximum control while minimizing recoil. The grip is made of durable, glass-filled polymer with a non-reflective, black finish. The overall length of it is 5.25 inches.

The Shockwave also features non-binding twin action bars; positive steel-to-steel lock-up; an anti-jam elevator; dual extractors; and an ambidextrous top-mounted safety. The receiver, which is made of anodized aluminum, is drilled and tapped for those who want to add optics and accessories. The mag tube, meanwhile, features a clean-out cap. Rounding out this package are rear and magazine cap sling swivel studs.

The 20-gauge Mossberg Shockwave is available now at a MSRP of $455. The 12-gauge model is the same price. For even more info, please visit

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