Mossberg Announces Their New 590S Pump-Action Line

Today, Mossberg introduced their new 590S Pump-Action Shotgun Series. They say these are “capable of cycling 1.75, 2.75 and 3-inch shotshells interchangeably, in any combination, without the use of an adaptor. 

The 590S Series includes two full-length stock options and two versions of the bird’s head-gripped Shockwave. (Photo courtesy of Mossberg)


Based upon Mossberg’s legendary 500 pump-action platform, 590 tactical guns include non-binding twin action bars; positive steel-to-steel lock-up and anti-jam elevator; dual extractors; drilled and tapped receivers; and universally-recognized, ambidextrous top-mounted safety. Enhancing the decades-proven 500 platform is a convenient clean-out magazine tube with cap for ease of maintenance. Additional features of the 590S series include black synthetic stock and forend; cylinder bore barrel (AccuChokeTM barrel on the 20-inch version); matte blue metal finish; sling swivel studs; and logo-engraved receiver on all models.

Key design changes of the 590S include a redesigned elevator and bolt slide combined with the addition of an energy-absorbing bumper. This patent-pending innovative platform allows the user to load their choice of shotshell length (1.75, 2.75 and 3-inch) and shotshell type for their specific shooting needs, and in any combination. Use of shorter shell lengths will also increase the overall capacity of the 590S.

Mossberg 590S chamber insert
Three New Components: With redesigned Elevator and Bolt Slide, and an addition of an energy-absorbing Bumper, the 590S is capable of cycling a range of 12GA shells interchangeably – straight out of the box. (Photo courtesy of Mossberg)

590S Pump-Action Shotguns (51603/51602) – Available in two configurations, the 590S with 18.5-inch barrel features a front bead sight and corncob forend, while the 20-inch version has an adjustable Ghost Ring sight, AccuChoke-compatible barrel and versatile M-LOK compatible forend. MSRP: $605 – $708

590S Shockwave Pump-Actions (51601/51600) – The compact bird’s head-gripped Shockwave versions come with a choice of 14.375 or 18.5-inch barrel lengths; front bead sight; and strapped, corncob-style forend for ease of control. MSRP: $605

Mossberg 590S shell lengths
“The new 590S Series provides complete shotshell flexibility. Load a common shell length based on specific use or load any combination of lengths.” (Photo courtesy of Mossberg)

Mossberg 590S Pump-Action Specs

Mossberg 590S Specifications
M-LOK is a registered trademark of Magpul Industries Corp.

About Mossberg

Founded in 1919, O.F. Mossberg & Sons, Inc., is the oldest family-owned firearms manufacturer in America, and is the largest pump-action shotgun manufacturer in the world. Celebrating 100 years of innovation, Mossberg leads the industry with over 100 design and utility patents to its credit and stands as the first ISO 9001 Certified long-gun manufacturer.

Check out our blog to read about The Case for the Lightweight Shotgun.