Mossberg 590M 12Ga Mag-Fed Shotgun | 18.5″ Barrel

Description

Picture this: you’re at the range, or maybe on a rural property, and you need to reload your shotgun fast. Fumbling with loose shells in a pocket or a traditional tube-fed reload feels slow. That’s where the magazine-fed shotgun changes the game. For the budget-conscious shooter who wants serious capability without a custom build price tag, the Mossberg 590M delivers a practical, no-fuss solution.

The Mossberg 590M, 12Ga, 18.5″ Barrel, 2.75″ Chamber, 10rd, Mag-Fed, Blued is a pump-action shotgun built on Mossberg’s legendary 590 platform, but redesigned to accept detachable box magazines. This gives you rapid reloads and the ability to easily switch between different load types. It’s a rugged, reliable defensive and utility shotgun that prioritizes function and value, priced at $559.85.

Let’s talk about the core feature: the magazine system. This isn’t an aftermarket conversion; it’s factory-engineered. The 10-round polymer magazine is durable and locks securely into the receiver. Reloading is as simple as hitting the magazine release and inserting a fresh one. That said, the real-world benefit is flexibility. Want to load a magazine with buckshot for home defense, then swap to a mag of birdshot for pests? It takes seconds. The system is drop-in ready and designed for reliability right from Mossberg.

The foundation is the proven Mossberg 590, known for its mil-spec toughness. The 18.5-inch barrel keeps the shotgun maneuverable in tight spaces, with a cylinder bore choke for reliable pattern performance at defensive ranges. The dual extractors, thick-walled barrel, and aluminum receiver are built to last. The blued finish is a classic, cost-effective corrosion resistance that looks the part of a serious tool. At just over 7.5 pounds unloaded, it has a solid, authoritative feel without being unwieldy.

Here’s the thing—when you compare this to other magazine-fed shotguns on the market, the value proposition becomes clear. You’re getting Mossberg’s reputation for rugged reliability at a price point that undercuts many competitors. You sacrifice some of the tactical aesthetics of more expensive models, but you gain a no-nonsense workhorse. The shotgun ships with one 10-round magazine, and additional magazines from Mossberg are readily available to expand your setup.

Mossberg 590M Specifications

Specification	Detail
Gauge	12 Gauge
Chamber	2.75″
Barrel Length	18.5 inches
Overall Length	39.5 inches
Capacity	10+1 Rounds (with included magazine)
Action	Pump Action
Finish	Blued
Weight	Approx. 7.5 lbs

Pros: The primary advantage is rapid reload capability and ammunition management. The Mossberg 590 platform is famously durable and simple. The price is highly competitive for a factory mag-fed shotgun. It’s compatible with many standard 590 aftermarket parts like stocks and forends, allowing for customization.

Cons: The polymer magazines add bulk when carrying spares. The blued finish requires more maintenance than modern coatings to prevent rust. Some shooters find the balance different than a traditional tube-fed shotgun. It’s a dedicated 2.75″ chamber, so it won’t fire 3.5″ magnum shells.

So who is this shotgun for? It’s ideal for the Missouri homeowner seeking a formidable defensive tool that’s simple to operate and quick to reload under stress. It’s for the budget-minded prepper or rural landowner who values logistical flexibility—easily managing different shell types for different tasks. It’s also a great choice for the shooter who just wants the unique utility of a magazine-fed shotgun without breaking the bank.

Frequently Asked Questions

Q: Are other magazines available for the 590M?

A: Yes. Mossberg produces 5, 10, 15, and 20-round magazines specifically for the 590M platform. The shotgun ships with one 10-rounder, but you can expand your kit with these factory options. They are widely available and ships to Missouri and compliant US states.

Q: Can I use accessories made for other Mossberg 500/590 models?

A: Mostly, yes. The receiver and barrel are standard 590 pattern, so many stocks, forends, and sight options designed for the 500/590 series will fit. The magazine well is the only major modification, so anything that interferes with that area may not be compatible.

Q: Is the magazine reliable with all types of ammunition?

A: The factory magazines are designed to feed a wide variety of 2.75″ shells reliably, from light target loads to full-power buckshot and slugs. As with any firearm, it’s wise to test your chosen defensive or duty ammunition thoroughly to ensure flawless function in your specific gun.

If you’re looking for a practical, magazine-fed shotgun that delivers proven Mossberg reliability at a straightforward price, the 590M is a compelling option. Check availability at firearms-missouri.com for Missouri residents and nationwide.