New Gun: Mossberg 590M Shockwave

New Gun: Mossberg 590M Shockwave

The 590M Shockwave provides overwhelming firepower and lightning-fast reloads with the addition of a double-stack detachable magazine.

How the 590M Shockwave improves on the pump-action platform:

  • Fed from a 10-round detachable, double-stack box magazine.
  • Gives the base model a 10+1 capacity.
  • Lightning-fast reloads compared to traditional tube magazines.
  • 5-, 10-, 15- and 20-round magazine upgrades are available.
  • Magazine release is ambidextrous and optimally-positioned.
  • Release and magazine situated not interfere with pump-action operation.

With the introduction of the 590 Shockwave, Mossberg made the tactical smooth-bore firearm short, sweet and wicked. And now, when it comes to firepower, it’s making the abbreviated pump-action platform overwhelming. The newly released 590M Shockwave 12-gauge mates Mossberg’s unique pistol-grip technically-not-a-shotgun design (more on that later) with the world’s first double-stack detachable box magazine meant for a shotgun. What comes out the other end is a nimble and devastating personal-defense gun that reloads in a split-second. Set up to give you a decided advantage, Mossberg’s freshly minted Shockwave is the ideal home-defense or truck-gun option.

590M Shockwave in profile

Out of the box, Mossberg supplies shooters with a 10-round magazine, but offers versatility to the non-NFA firearm with aftermarket 5-, 10-, 15- and 20-round magazines. In all cases, the 15-inch barreled 590M Shockwave magazines have integral stabilizing ribs, which engage the magazine directly to notches machined into the receiver, ensuring a positive lock-up. The all-steel, heated-treated magazine release button and housing are optimally-positioned in front of the trigger guard for convenient, ambidextrous access for unloading and reloading. The location of the mag release does not interfere with the cycling of the action and maintains proper balance with a full-magazine located at the center of gravity point.

Based upon the proven Mossberg 500 pump-action platform, standard features of the $721 590M Shockwave include non-binding, twin action bars; positive steel-to-steel lock-up, dual extractors, anodized aluminum receiver drilled and tapped for the convenience of adding optics. The barrel is heavy-walled, and the magazine tube is capable of chambering 2 3/4 -inch shells.

Unique to the Shockwave platform, and providing its novel moniker, is the Shockwave Technologies Raptor pistol grip. The grip features an enhanced textured finish and has a “bird’s head” shaped-profile, allowing for maximum control while minimizing felt recoil. A glass-filled polymer with non-reflective, black finish, the 5.25-inches grip makes the 12-gauge’s recoil manageable and gives complete control over the gun. The cob-styled, tactical forend features a control strap, facilitating smoother operation.

590M Shockwave grip and magazine

The 590M Shockwave features an overall length of 27.5 inches, recoil-taming pistol grip (not designed to be shoulder-mounted), compact 15-inch barrel length and the convenience of magazine-feeding. By definition, the Shockwave platform is a “firearm” under the Gun Control Act of 1968 (GCA), and is not subject to the provisions of the National Firearms Act (NFA), although state and local laws may be more restrictive.

To learn more about the Mossberg 590M Shockwave, please visit

Mossberg 590M Specs
Gauge: 12
Capacity: 11
Chamber: 2.75″
Barrel Type: Heavy-Walled
Barrel Length: 15″
Sight: Bead
Choke: Cylinder Bore
Barrel Finish: Matte Blue
Stock Finish: Raptor Grip / Corn Cob Forend w/ Strap
Weight: 6.55 pounds
Length: 27.5″
MSRP: $721


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