Mossberg’s New Magazine-Fed 590M Shockwave 12 Gauge

Mossberg 590M Shockwave 12 Gauge

Earlier this year, Mossberg added a .410 gauge model to their line of 590 Shockwave non-shotgun shotguns. The .410 accompanies their 12 and 20 gauge versions and provides a lighter, softer-shooting little non-NFA powerhouse. Now Mossy’s added a magazine-fed version, the 590M Shockwave for when capacity (11 rounds of 12 gauge out of the box) is really important. Here’s their press release . . .

North Haven, CT – Combining the convenience and adaptability of a mag-fed shotgun with a “Non-NFA” pump-action platform, Mossberg is proud to introduce the 590M Shockwave 12-gauge firearm with 15-inch barrel, pistol grip and the world’s first double-stack, 10-round shotgun magazine. And for greater versatility, optional 5, 10, 15 and 20-round capacity magazines are sold as accessories. This compact 12-gauge is classified by the BATFE (Bureau of Alcohol, Tobacco, Firearms and Explosives) as a “Non-NFA Firearm,” requiring no tax stamp for transfers.

Based upon Mossberg’s proven pump-action platform, standard features of the 590M Shockwave include non-binding twin action bars; positive steel-to-steel lock-up; dual extractors; anodized aluminum receiver drilled and tapped for convenience of adding optics; 15-inch heavy-walled barrel; convenient cleanout magazine tube; and universally-recognized, ambidextrous top-mounted safety. With the included 10-round magazine, these 12-gauge 2.75-inch pump-actions have a total round capacity of 10+1.

Unique to the Shockwave platform, and providing its novel moniker, is the Shockwave Technologies Raptor® pistol grip.

This well-designed pistol grip features an enhanced textured finish and has a “bird’s head” shaped-profile, allowing for maximum control while minimizing felt recoil. The grip is constructed of durable, glass-filled polymer with non-reflective, black finish and has an overall length of 5.25 inches. Completing the furniture package for the 590M Shockwave is the cob-styled, tactical forend which is strapped for greater control and smoother operation.

At the core of the 590M Shockwave are the magazine’s 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 cycling of the action. The well-executed design allows for proper balance with a full-magazine located at the center of gravity point.

As a first for mag-fed shotguns, the 590M design features a patented double-stack magazine constructed with hardened-steel feed lips, over-molded steel shell ramps and an anti-cant, rounded follower to ensure reliable feeding. Additional features include an easy-grip, molded external shell; proprietary self-lubricating polymer magazine body; heavy-duty ASTM-A-228 music-wire magazine spring for prolonged service life; removable floor plate for ease of cleaning; and durable black oxide finish on the steel components. This proprietary double-stack magazine design provides greater capacity in less magazine length versus competitor’s single stack magazines.

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 read a copy of the letter from the BATFE regarding federal classification of the Shockwave or more information on Mossberg’s family of Shockwave firearms, including the 590M Shockwave, please visit

Mossberg Shockwave DM

Shockwave® and Raptor® are registered trademarks of Shockwave Technologies/Ewer Enterprises LLC. 

Disclaimer: Although the Mossberg 590 Shockwave is classified as a “firearm” under the Gun Control Act of 1968 (GCA), and is not subject to the provisions of the National Firearms Act (NFA), state and local laws may be more restrictive. Although it is legal federally, the 590 Shockwave may be considered a “short-barreled” shotgun or “assault weapon” by certain state and local laws; and therefore illegal to possess. Please check with your local authorities concerning the legality of possessing a firearm of this configuration.


  1. avatar Geoff "Mess with the Bull, get the Horns" PR says:

    *That*, right there, is the cat’s furry ass for home defense.

    Shut up and TAKE MY MONEY!

    1. avatar Lost Down South says:

      That’s what I’m talkin’ about.

    2. avatar achmed says:

      That right there is a silly gun. Needs a stock. Unless you’re actually using it to breach doors . . . in your own house . . . during a self-defense scenario.

      But for making noise and blowing up dirt it will be awesome. If you like it then have at it, spend away.

      1. avatar Jonathan--Houston says:

        What do you need a stock for with this? You aren’t shooting long distance. Neither are you managing heavy recoil. Really, the only practical difference between 12 gauge and a .410 bore shotguns is that the 12 ga. carries more shot of a given size and packs more powder for a shell of a given length, relative to the .410 bore. Those are primarily hunting considerations. They’re differences that matter at distances far, far greater than home defense distances.

        At home defense distances, in terms of effect on your intended target, the two are essentially identical. You aren’t going to have a much different outcome per shot between the two. What you will get are a lot more shots on target with the .410, especially with smaller framed shooters.

        “Silly gun” rhetoric is just uninformed gun snobbery. This thing is about the most devastating close quarters combat weapon known to man. Or as I like to say, it’s borderline immoral.

        1. avatar Big Bill says:

          You might want to go back and read the article. It’s about the 12 gauge model, even though it mentions that the Shockwave is now available in .410 gauge.
          And if you think, seriously, that there’s no real difference between 12 gauge and .410 gauge in home defense, I think you’re mistaken

  2. avatar Goby says:

    Could want with an arm brace.

    1. avatar Anner says:

      I’ve done it (tube-fed, not mag fed…yet), and it’s so worth it. It’s a bruiser on the shoulder with even low-recoil 00 buck, but with Aguila mini shells it’s a hoot. By far the lightest shoulder-able shotgun I’ve ever held.

      1. avatar BLAMMO says:

        Eight mini shells in the tube is nice. Don’t forget the Topsol mini clip for reliable feeding, but I’ve also shot mini shells without the clip with no problems. Fiocchi reduced recoil loads are pretty tame too, and reasonably priced.

        What I like about the Shockwave is how sleek and compact it is. And how it slips nicely into a scabbard. The magazine ruins that, so no thanks.

        1. avatar Jonathan-Houston says:

          Would it be possible to design a dual magazine shotgun, such that you can flip a switch and feed from either an internal tube magazine or an external detachable magazine?

          If I recall correctly, doesn’t the KSG have two internal magazines a user can switch between, providing a total capacity of 14+1? It isn’t the exact same thing, but serves a similar purpose.

        2. avatar Anner says:

          The KSG’s mag tubes are parallel, and the switch physically blocks one tube while allowing the other to feed. Given that a tube and mag combo would need something to block/rotate from 2 different directions, it wouldn’t be nearly as simple. However, if it was a thing I’d gladly pay a premium. You could have the mag selected first as a default then swap to the tube while you found another mag. The versatility would be outstanding.

  3. avatar Sich says:

    Kinda of a Odd Looking Magazine…

  4. avatar David Walters says:

    All I want to know is if it’s legal in Texas.

  5. avatar jwm says:

    Wonder how much the mags cost. My pump guns have bottomless tube mags. Always full.

    1. avatar Sich says:

      Let’s just say, A Lot. One retailer listed the 590M Shockwave w/Magazine for ~$663.00 and ~$499.00 w/o Magazine. And it “didn’t” even state the Capacity of the Magazine.

      1. avatar BLAMMO says:

        Mag capacity is 10 rounds. And the going price for the standard Shockwave is well under $400.

        1. avatar Sich says:

          Then buy it…

        2. avatar Big Bill says:

          As I understand it, the mags come in 5, 10 and 20 round capacity. A 10 rounder comes with the gun.
          I see an ad for a 20 rounder from Natchez for “under” $130 – $129.99.

  6. avatar Shire-man says:

    Having spent some course time with a regular shockwave and a different magazine fed shorty I didn’t much care for the mag fed. Felt awkward. I found it much faster to run the tube fed gun. As a semi maybe it would be a different story.

    1. avatar Geoff "Mess with the Bull, get the Horns" PR says:

      It’s *possible* they could scrunch something down in semi-auto to fit that profile, but I fear the screams of “It’s a STREET SWEEPER!” will echo throughout the land and get it banned real fast…

      1. avatar ACP_armed says:

        You mean like the SKO Shorty —

      2. avatar Jonathan D. says:

        Or this Origin 12g…

  7. avatar billy-bob says:

    Cool beans. When does the drum mag come out?

    1. avatar Sich says:

      Already out! But can’t find any in current stock anywhere or for how much…

  8. avatar Chris Mallory says:

    Looks like they made a few changes to the shotgun as well. This is advertised as a 15 inch barrel, the original shockwave has a 14.375 inch barrel. OAL is listed as 26.37 for the original and 27.5 for this model. The magazine fed model weighs about a pound and a half more.

    Just looking at pictures of both, it looks like the foregrip is set back more on the magazine fed model.

  9. avatar jwm says:

    I think the first, tube fed shockwave would make a great range toy and maybe a near perfect home defense gun. I would like one in 20 ga. for me and .410 for my wife.

    But I live in CA………

    1. avatar Sich says:

      Minimum Barrel length is 18.5″ in California…

  10. avatar MojoRonin says:

    Hey mossberg, remember those folks that bought a 930?, make a magazine fed version and we’d buy those, too!

  11. avatar Ogre says:

    I got a Mossberg “Shockwave” in 12-ga a couple years ago and am just fine with it. It’s a great little home defense gun. I got the adapter and shoot the short Aguilla shells (buckshot or slugs). The firearm holds enough ammo for me, has reduced recoil and is easy to reload, too. I can’t say that I like that big magazine sticking out of the new 590M Shockwave – looks like would be unhandy to carry around and use.

  12. avatar Sian says:

    Why is the magazine so ugly and expensive though.

  13. avatar Stereodude says:

    I don’t see the appeal over the standard Shockwave. It sure seems like the magazine hanging down will make the gun more unwieldy to handle and certainly less stashable/storable.

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