Description
If you are looking for a shotgun that will stand up to years of range trips and home defense training with your family, the Mossberg 590A1 12 Gauge 20in Pump-Action Shotgun is built exactly for that purpose. This model starts with a heavy-walled 20-inch barrel finished in rugged Tungsten Cerakote. It pairs a ghost-ring rear sight with a fiber-optic front for fast, practical target acquisition. The black synthetic stock includes spacers so you can adjust length of pull for smaller or larger shooters. This is a no-nonsense pump gun designed for reliable service use.
| Manufacturer | Mossberg |
|---|---|
| Model | 590A1 |
| Material | Heavy-walled barrel, synthetic stock, aluminum receiver (per manufacturer specs) |
| Compatibility | 12 Gauge 3-inch shells; accepts standard Mossberg 500/590 accessories |
| Finish | Tungsten Cerakote on barrel; parkerized metal underneath |
| Weight | 7.25 lbs (empty, per manufacturer specs) |
| Condition | New |
Key Features
- Heavy-walled 20-inch barrel with Tungsten Cerakote — This barrel is thicker than standard models, which means it stays accurate even after rapid strings of fire. The Cerakote finish resists rust and wear from cleaning solvents.
- Ghost-ring rear sight with fiber-optic front — You get a wide rear aperture for fast sight alignment and a bright front dot for low-light shooting. That means quicker hits on steel or clay targets.
- Adjustable length of pull stock — Spacers let you shorten or lengthen the stock to fit teens, smaller-framed shooters, or anyone wearing heavy clothing. This helps new shooters mount the gun correctly and stay on target.
- Corncob-style forend — The ribbed design gives you a secure grip even with wet or gloved hands. It reduces the chance of slipping during fast cycling.
- Dual extractors and positive steel-to-steel lockup — These are the same internals used in law-enforcement models. They ensure reliable extraction and chambering under dirt, carbon, or light debris.
Who It’s For
This shotgun is ideal for families who want one gun that can handle home defense, recreational shooting, and introductory classes for new shooters. The adjustable stock makes it easy to pass the gun around the family. The ghost-ring sights are simple enough for beginners but precise enough for experienced shooters. It also works well for hunters who hunt in thick cover or need a durable truck gun.
Pros & Cons
- Pro: Heavy barrel reduces point-of-impact shift during long strings — a real advantage if you run drills or shoot slugs.
- Pro: Ghost-ring sights are far more durable than bead sights and give you a repeatable sight picture.
- Pro: Stock spacers let you customize fit without buying a new stock.
- Con: At 7.25 lbs empty, it is heavier than a standard Mossberg 500. That extra weight helps with recoil control, but smaller shooters may find it tiring to hold for long periods.
Comparison
| Feature | Mossberg 590A1 20in | Mossberg 500A 20in | Remington 870 Express 20in |
|---|---|---|---|
| Barrel wall thickness | Heavy-walled (0.065 in) | Standard (0.045 in) | Standard (0.045 in) |
| Sights | Ghost-ring + fiber optic | Bead sight | Bead sight |
| Finish | Tungsten Cerakote | Blued | Parkerized |
| Stock adjustability | Yes (spacers included) | No | No |
| Weight | 7.25 lbs | 6.75 lbs | 7.0 lbs |
| Price | $857.98 | $499.99 | $479.99 |
FAQ
What is the highest capacity Mossberg shotgun?
The highest capacity factory Mossberg shotgun is the 590A1 with a 20-inch barrel and 9-round tube (8+1 capacity). Some aftermarket extensions can push it higher, but the 590A1 20in holds the most rounds out of the box.
What are the Mossberg 500A 12 Gauge specs?
The Mossberg 500A 12 Gauge typically has a 20-inch barrel, 6+1 capacity, bead sight, and a blued finish. It weighs about 6.75 lbs. The 590A1 upgrades the barrel to heavy-wall, adds ghost-ring sights, and uses a Cerakote finish.
Can I use 3-inch shells in the Mossberg 590A1 12 Gauge 20in?
Yes. The 590A1 is chambered for 3-inch shells. You can shoot both 2.75-inch and 3-inch loads without any modifications.
Trust & Delivery
✔ Nationwide delivery (all 50 states)
✔ Ships 1-2 business days
✔ 30-day returns
✔ Secure checkout
Shotguns | Pump Action Shotguns | Defensive Shotguns
Last updated: April 2026
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