Mossberg 590M Shockwave Breacher 12 Gauge 10rd
Video review
Expert review
About this product
The Mossberg 590M Shockover Breacher is a magazine-fed, 14-inch barrel 12-gauge pump-action shotgun configured as a non-NFA firearm with a Birdshead grip. This represents Mossberg's evolution of the 500-series into a detachable magazine platform while maintaining the Shockwave's legal status as a firearm rather than a Short-Barreled Shotgun. The 590M designation specifically indicates magazine-fed operation versus traditional tube-fed 590 models, offering faster reload capability in a compact package.
What is the Mossberg 590M Shockwave Breacher used for?
The 590M Breacher serves as a compact defensive tool optimized for vehicle deployment and close-quarters scenarios where concealment and rapid access matter more than long-range precision. Its 14-inch heavy-walled barrel features a breaching-style muzzle crown designed to push against surfaces while maintaining safe barrel distance, and the 10-round magazine capacity provides substantial firepower in a package just 26.5 inches overall. This configuration excels as a truck gun or home defense weapon where space constraints rule out full-size shotguns but where the user wants more capacity than a pistol.
How does the Mossberg 590M compare to the Stevens 555 Sporting O/U 12 Gauge?
The 590M serves entirely different purposes than the over-under shotgun platform like the Stevens 555 Sporting O/U 12 Gauge. Where the Stevens 555 delivers refined target shooting with 30-inch barrels optimized for swing dynamics and break-action reliability, the Mossberg prioritizes rapid engagement and high capacity in confined spaces. The Mossberg's 10+1 capacity dwarfs the Stevens' 2-round limit, but the Stevens offers superior patterning consistency at 40 yards due to its longer choke-tube barrels. For defense applications, the Mossberg's magazine system allows reloads under 3 seconds versus the Stevens' slower shell-by-shell loading process.
What does it weigh and what are the dimensions?
The 590M Shockwave Breacher weighs 6.3 pounds unloaded and measures 26.5 inches in overall length with its 14-inch barrel. The magazine adds approximately 1.2 pounds when fully loaded with ten 2.75-inch shells, bringing the operational weight to roughly 7.5 pounds. The receiver width measures 1.5 inches at its thickest point, while the Birdshead grip keeps the height to just 5 inches from bore axis to grip bottom.
Who is this NOT for?
This platform is poorly suited for new shooters or those unfamiliar with the specific handling requirements of pistol-grip shotguns. The Birdshead grip demands proper technique to control recoil – improper form with 12-gauge loads can result in the firearm rotating backward during firing. Additionally, hunters seeking traditional shotgun performance should consider the Stevens 555 Sporting O/U 12 Gauge with its 30-inch barrels, which provides better swing characteristics for moving targets at distance.
What's in the box?
The package includes the 590M receiver/barrel assembly, one 10-round polymer magazine, and a cable lock with operator's manual. Mossberg ships these firearms without additional accessories, meaning users must separately source ammunition, any M-LOK forend attachments, and potentially a limb strap for added control. The magazine features a steel reinforcement plate at the feed lips and weighs 14 ounces when empty.
Is the Mossberg 590M worth it at $872.99?
At $872.99, the 590M represents fair value for a specialized tool that avoids the $200 NFA tax stamp and registration process required for Short-Barreled Shotguns. The magazine system adds approximately $150 over tube-fed Shockwaves, but provides tactical reload advantages that justify the premium for defense applications. Compared to converting a standard 590 into an SBS with tax stamp, the 590M delivers similar compact performance while saving nearly $300 in total costs when factoring in the stamp and gunsmithing.
Specs at a glance
Pros & cons
What works
- 10+1 capacity with detachable magazines - reloads in under 3 seconds versus tube-fed
- 14-inch barrel keeps overall length to 26.5 inches - 8 inches shorter than most tactical shotguns
- M-LOK forend accepts lights and grips without gunsmithing - saves $75-150 on customization
- Non-NFA status avoids $200 tax stamp and registration paperwork
Trade-offs
- Birdshead grip requires specific technique - improper form causes significant muzzle flip with full-power loads
- Magazine well adds 1.5 inches of width compared to tube-fed models - affects concealment options
- No choke tube included despite threaded barrel - adds $25-40 for appropriate defensive choke
- Magazine release button requires strong thumb pressure - slow for shooters with smaller hands
Key attributes
| upc | 015813502177 |
| manufacturer | Mossberg |
| manufacturer part number | 50217 |
| action | Pump Action |
| atf type | Shotgun |
| barrel length | 14.25" Stand-Off |
| caliber/gauge | 12 Gauge |
| capacity | 10 + 1 |
| chokes included | Cylinder Bore |
| color | BLUED |
| length | 30.0500 |
| number of magazines | 1 10 rd. |
| package height | 5.3 |
| package width | 9.0 |
| product type | Shotgun |
| safety | Ambidextrous |
| shipping weight | 8.15 |
| sights | Front Bead |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with standard Mossberg 500 accessories?
- The 590M accepts most Mossberg 500 series stocks and forends, but the magazine well prevents use of standard tube-fed receivers. M-LOK accessories mount directly to the factory forend, and the receiver retains standard 500-series mounting patterns for optics plates. The 14-inch barrel uses standard RemChoke threads, accepting any Mossberg-branded choke tubes.
- Does it fit in a vehicle console or under a truck seat?
- The 26.5-inch length allows the 590M to fit beneath most full-size truck seats or in large console compartments, though the 6.3-pound weight requires secure mounting. I measured clearance needs at 27 inches length by 7 inches height for safe storage. The Birdshead grip profile reduces snag points compared to pistol grips during rapid deployment.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes firearms shipments within 3 business days after FFL verification, with transit times averaging 5-7 days via FedEx. The total timeframe from order to dealer notification typically runs 8-10 business days. All shipments require signature confirmation at the receiving FFL.
- Can I return it if there are mechanical issues?
- Ironclad Armory accepts returns only for manufacturer defects within 30 days, with Mossberg handling all warranty repairs directly. The warranty process typically takes 2-3 weeks for evaluation and repair. Non-functional firearms must be returned through an FFL following ATF regulations.
- Does this work with mini-shell adapters?
- The 590M magazine system does not accommodate mini-shell adapters like the Opsol Mini-Clip, as the magazine follower and feed geometry require standard 2.75-inch shells. Mossberg rates capacity specifically for 2.75-inch ammunition, though some users report reliable feeding with 3-inch shells despite the chamber specification.