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Mossberg 590A1 Magpul Series Pump Action 12 Gauge 20" Barrel 9+1 Rounds
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: WX2*0643090
Overview
Built for close-range defensive use, this 12-gauge pump shotgun pairs a 20-inch barrel with a 9+1 capacity and a matte black finish for a restrained, duty-oriented look. The Magpul SGA stock is adjustable and includes an optional cheek riser, giving users flexibility when setting up for optics or raised sights. A ghost ring sight system and Picatinny top rail support fast target acquisition and accessory mounting, while the MOE forend adds hand stops and compatibility with MOE rails, mounts, and accessories. It is a practical option for hunters and outdoorsmen who want a configurable shotgun for home defense or professional security applications.
Why Hunters Choose the Mossberg
Adjustable Magpul
SGA stock supports customizable fit
Moe Forend
Includes front and rear hand
Fully Compatible
MOE rails, mounts, and accessories
Ghost Ring
Sight system supports quick target
Picatinny Top
Rail accepts optics and tactical
Key Features
- Mossberg 590A1 Magpul Series 12 gauge pump shotgun with 20-inch barrel.
- 9+1-round capacity provides extended loading before reloading is needed.
- Adjustable Magpul SGA stock includes an optional cheek riser for optics or raised sights.
- MOE forend features front and rear hand stops for added control.
- Ghost ring sight system supports quick target acquisition.
- Picatinny top rail accepts optics and other tactical accessories.
- Includes a Cylinder choke tube.
Best Used For
- Home defense users wanting a 12-gauge pump shotgun with a 9+1 capacity and adjustable stock.
- Professional security personnel needing a configurable shotgun with optics-ready mounting options.
- Left- or right-handed shooters who want ambidextrous safety and controlled handling features.
- Shooters planning to add compatible rails, mounts, or accessories to a tactical shotgun platform.
- Users who prefer ghost ring sights and a Picatinny top rail for sighting flexibility.
Specifications
| Accessory Compatibility | MOE rails, mounts and accessories |
|---|---|
| Action | Pump Action |
| Barrel Length | 20" |
| Blade Finish | Matte black |
| Capacity | 9+1 Rounds |
| Cheek Riser | Optional |
| Choke Tube | Cylinder choke tube |
| Forend | MOE forend |
| Gauge | 12 Gauge |
| Hand Stops | Front and rear |
| Optics Compatibility | Yes |
| Safety | Ergonomic, ambidextrous top-tang safety |
| Sight System | Ghost ring sight system |
| Stock | Magpul SGA stock |
| Stock Adjustability | Adjustable |
| Top Rail | Picatinny top rail |
Pros
- Adjustable Magpul SGA stock supports customizable fit for multiple applications.
- MOE forend includes front and rear hand stops for added control.
- Fully compatible with MOE rails, mounts, and accessories.
- Ghost ring sight system supports quick target acquisition.
- Picatinny top rail accepts optics and tactical accessories.
- Ambidextrous top-tang safety suits right- or left-handed use.
Considerations & Trade-offs
- The adjustable Magpul SGA stock adds flexibility, but it also means the setup may need to be tuned to the shooter and intended use before it feels fully dialed in.
- The included ghost ring sight system and Picatinny top rail support optics and raised sights, yet the optic itself is not included and must be selected separately.
- The 20" barrel and 9+1 capacity make this a substantial pump shotgun, so it is less compact than shorter, lower-capacity options.
- It includes a Cylinder choke tube, which is a practical default, but users needing a different pattern or application will need to choose an alternate choke setup.
Suggested Comparisons
- Pump-action 12 gauge shotguns
- Home defense shotguns
- Tactical shotguns
- Shotguns with adjustable stocks
Suggested Accessories
- Shotgun sling
- Optics mount
- Choke tube
- Cleaning kit
Frequently Asked Questions
What is the magazine capacity of the Mossberg 590A1 Magpul Series?
The product title lists it as 9+1 rounds, and the short description also refers to 9 shots.
Does this shotgun come with an adjustable stock?
Yes. The long description says it includes an adjustable Magpul SGA stock, and the short description notes an optional cheek riser for use with optics and raised sights.
What sighting system does it use?
The long description says it has a ghost ring sight system, and it also includes a Picatinny top rail for optics and other tactical accessories.
Is the safety ambidextrous?
Yes. The long description states it has an ergonomic, ambidextrous top-tang safety.
What choke tube is included?
The long description says it includes a Cylinder choke tube.