Description
The Mossberg 590A1 Magpul Series 12 Ga, 20″ Barrel, 3″, Magpul SGA Black, 9rd is a purpose-built, tactical 12-gauge pump-action shotgun. It combines the legendary, mil-spec ruggedness of the 590A1 platform with modern Magpul furniture for enhanced ergonomics and control. This configuration is designed for serious defensive use, offering a 9+1 capacity and a 20-inch barrel that balances maneuverability with ballistic performance. It’s a drop-in ready package for the user who demands proven reliability and modern handling in a single platform.
Key Features
- Mil-Spec 590A1 Core: Heavy-walled barrel, metal trigger guard, and metal safety for maximum durability under hard use.
- Magpul SGA Stock & Forend: Provides superior grip, multiple length-of-pull adjustments, and integrated M-LOK slots for accessory mounting.
- 20-Inch Barrel: The ideal length for navigating doorways and vehicles while maintaining effective sight radius and velocity.
- 9+1 Round Capacity: Offers substantial firepower with the standard tube, minimizing reloads in a critical situation.
- 3-Inch Chamber: Handles a wide range of 12-gauge loads, from light target rounds to powerful defensive slugs and buckshot.
Specifications & Details
| Gauge | 12 Gauge (3″ Chamber) |
| Barrel Length | 20 Inches |
| Overall Length | 40.5 Inches (Approx.) |
| Capacity | 9+1 Rounds |
| Weight | 7.25 lbs (Unloaded, Approx.) |
| Stock | Magpul SGA (Black) |
When it comes to home defense, you need a tool that works without a second thought. The 590A1’s dual extractors, anti-jam elevator, and positive slide release are engineered for that moment. The Magpul SGA stock isn’t just for looks—its textured surfaces and aggressive checkering give you a solid, non-slip hold, whether you’re wearing gloves or not. At a weight of approximately 7.25 pounds unloaded, it manages recoil effectively without feeling cumbersome during extended drills or patrols. This package is available at firearms-missouri.com for Missouri residents and nationwide.
Who It’s For
This shotgun is for the prepared individual who prioritizes function over flash. It’s for the homeowner securing a large property, the tactical enthusiast who trains seriously, or the professional seeking a dependable secondary option. If your philosophy is “buy once, cry once” for gear that must perform, this configuration speaks your language. It’s also a favorite for those who appreciate the ability to customize further, as the M-LOK forend is compatible with a wide range of lights and lasers from brands like Streamlight and SureFire.
Pros & Cons
Pros: Unmatched Mossberg 590A1 reliability meets modern ergonomics. The Magpul furniture offers immediate improvements in grip and adjustability with no gunsmithing required. The 20-inch barrel and 9-round capacity create a versatile, potent defensive tool. Its robust construction ensures it will handle a lifetime of training and use.
Cons: The mil-spec build adds weight compared to standard commercial shotguns. The bead sight is functional but some users may prefer to upgrade to ghost ring or optic-ready systems. That said, the solid foundation is worth the initial heft for the peace of mind it delivers.
Frequently Asked Questions
Q: Does this model have a ghost ring sight?
A: No, this specific configuration comes from the factory with a standard bead front sight. The heavy-walled barrel is drilled and tapped, however, making it straightforward to add a Picatinny rail and an optic or a dedicated ghost ring sight system later if desired.
Q: Can the stock be shortened for smaller-statured users?
A: Yes. The Magpul SGA stock includes interchangeable spacers to adjust the length of pull, allowing you to tailor the fit to your arm length and body size for optimal control and comfort. This is a major advantage over fixed-stock shotguns.
Q: Is the forend compatible with standard 590/500 accessories?
A: No, it is not. The Magpul forend is specific to models that use the 590A1-style action tube assembly. This model includes the correct Magpul forend, so you’re good to go. Just be aware if purchasing separate forends for other Mossbergs in your collection.
Priced at $751.99, this Mossberg 590A1 Magpul Series represents a significant value for a turn-key, professional-grade tactical shotgun. You’re getting a platform trusted by military and law enforcement worldwide, already upgraded with some of the most sought-after aftermarket components. The combination is hard to beat for a ready-to-role defensive firearm. FFL transfer required for firearm purchases. See the full product details to start the process.
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