Mossberg 590M 12 Gauge 18.5″ 10+1 Magpul SGA Orange
About this product
The Mossberg 590M is a 12-gauge, pump-action, magazine-fed shotgun built for controlled operation in duty and training environments. It combines the reliability of Mossberg’s 500-series platform with the modern convenience of a detachable-box-magazine system. This specific 50222 model ships from the factory with an 18.5-inch barrel and a high-visibility Magpul stock, creating a purpose-built tool for serious shooters.
What is the Mossberg 590M 12 Gauge used for?
The Mossberg 590M is primarily used for tactical training, duty, and home defense. Its magazine-fed design allows for faster reloads under pressure compared to traditional tube-fed shotguns, a critical advantage for scenario-based training. The drilled-and-tapped receiver and Cerakote barrel also make it a solid base for building a dedicated breaching or vehicle gun.
How does the Mossberg 590M compare to a Remington 870?
The Mossberg 590M offers a faster and more versatile reload system than the classic tube-fed Remington 870. While the 870 is a proven workhorse, reloading its tube magazine is slower and more cumbersome than swapping a pre-loaded 10-round box magazine on the 590M. The 590M is objectively better for rapid, repeated engagement simulations, though the 870 has a wider aftermarket for stocks and forends.
What does it weigh and what are the dimensions?
Unloaded with an empty magazine, the 590M weighs 6.4 pounds, making it heavier than many traditional pump shotguns due to its steel receiver and magazine well. Its overall length is 38.5 inches with the 18.5-inch barrel, and the Magpul SGA stock has a length of pull that is adjustable from 12.5 inches to 14.5 inches to fit a wide range of shooters.
Who is this NOT for?
This shotgun is not for the casual clay shooter or someone seeking a traditional hunting firearm. The magazine fed system and tactical orientation add weight and complexity irrelevant for breaking clays or pursuing waterfowl. If your primary use is wingshooting, a traditional over-under like the Stevens 555 Sporting is a far more suitable and balanced choice.
What's in the box?
The shotgun ships with a single 10-round polymer magazine and a fiber-optic front sight installed. From the factory, you receive the firearm, the magazine, and basic safety documentation. You will need to purchase additional magazines, sling mounts, and optics separately to build a complete system.
Is the Mossberg 590M worth it at $925.99?
At $925.99, the Mossberg 590M is a justifiable investment for a shooter who specifically needs and will train with a magazine-fed pump-action system. The cost reflects the specialized engineering of the magazine system and the inclusion of premium components like the Magpul stock and Cerakote finish. For a general-purpose shotgun, a standard Mossberg 500 or Remington 870 at half the price is a more economical and proven choice.
Specs at a glance
Video review
Pros & cons
What works
- Magazine-fed reloads are 5-7 seconds faster than topping off a tube under stress.
- Receiver is pre-drilled and tapped for direct optic or rail mounting—no gunsmithing required.
- Adjustable Magpul SGA stock offers a length of pull from 12.5" to 14.5" to fit most shooters.
- Tungsten Gray Cerakote barrel finish adds significant corrosion resistance over standard parkerization.
Trade-offs
- The steel receiver and magazine system push weight to 6.4 lbs unloaded, 1.2 lbs heavier than a basic Mossberg 500.
- Spare 10-round magazines cost $45-60 each, adding significant expense to build a proper loadout.
- No sling swivel studs are included on the stock, requiring an aftermarket installation for a two-point sling.
Expert review
Key attributes
| upc | 015813502221 |
| manufacturer | Mossberg |
| manufacturer part number | 50222 |
| barrel length | 18.50" |
| caliber/gauge | 12 Gauge |
| capacity | 10 + 1 |
Frequently asked questions
- Is it compatible with standard Mossberg 500 barrels?
- No, the 590M is not compatible with standard 500-series barrels due to its unique magazine well design that extends forward of the receiver. You must use barrels specifically designed for the 590M model, which are currently more limited in selection than the standard 500 series.
- Does it fit in a standard 18-inch shotgun case?
- No, you will need a case with an interior length of at least 40 inches. The overall length of 38.5 inches means most compact 18-inch cases are too short. We recommend a 42-inch hard case from Plano or Pelican for secure transport.
- How long does shipping take?
- All firearm sales are subject to a mandatory processing and compliance check, which takes 3-5 business days before the item ships. After that, standard ground shipping is an additional 5-7 business days to your selected FFL dealer.
- Does this work with a Mesa Tactical Side Saddle?
- Yes, the receiver is a standard Mossberg 500/590 pattern. A Mesa Tactical 6-shell aluminum side saddle mounts directly to the receiver using the provided hardware kit, adding approximately 12 ounces of weight but providing immediate access to spare shells.