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There are pump shotguns, and then there is the 590A1. This is the model Mossberg builds for the U.S. military, and the 500/590 platform remains the only pump action to pass the full Mil-Spec 3443 protocol. Where standard 590s use polymer for the trigger guard and safety button, the A1 swaps in metal for both, and the 20 inch barrel is heavy-walled to shrug off dents and abuse that would sideline a lighter tube. The parkerized finish on the barrel and receiver is the same no-glare, corrosion-resistant treatment you find on duty guns, and it wears in rather than wearing out.
The ghost ring rear sight pairs with a winged front post to give you a proper aiming system instead of a lone bead. Your eye centers the front post in the ring naturally, so you get fast target acquisition up close and real precision when you stretch slugs out past typical bead-sight distances. The rear is adjustable, so you can dial it in for your preferred load. The receiver is also drilled and tapped if you ever want to mount an optic down the road.
Underneath, you get everything that made this platform a favorite for decades: dual extractors, twin action bars, positive steel-to-steel lockup, and the anti-jam elevator that keeps shells feeding smoothly under stress. The tang-mounted safety sits right under your thumb and works the same whether you run it righty or lefty. The 3 inch chamber handles magnums when you want them, and the full-length magazine tube holds 8 rounds of 2.75 inch shells with one more in the pipe. A black synthetic stock and sling swivel studs round out the package at a hair over 7 pounds.
This one makes sense for anyone who wants a defensive shotgun with zero gimmicks and a track record measured in decades of hard service. It is a lot of gun for home protection, patrol-style duty use, or just owning a scattergun you will never have to baby. Buy it once and it will still be running long after you are done arguing about what to feed it.
The 590A1 is the beefed-up, military-grade version of the 590. It uses a heavier-walled barrel, a metal trigger guard, and a metal safety button in place of the polymer parts found on standard models. It is the configuration built to meet military durability requirements, which is why it is the pump gun of choice for a lot of law enforcement and armed forces units.
Yes, it has a 3 inch chamber and runs both 2.75 and 3 inch shells. The magazine tube holds 8 rounds of 2.75 inch shells for 8+1 total, and with longer 3 inch magnums you will fit one fewer round in the tube. Most folks run 2.75 inch buckshot or slugs for defensive use anyway.
The rear ghost ring is adjustable so you can zero it to your preferred slug or buckshot load. This model comes with Mossberg's standard ghost ring setup, not the XS version found on some variants. The receiver is drilled and tapped, so adding a rail and a red dot later is a simple job.
It is one of the best pump guns you can pick for the job. The 8+1 capacity, cylinder bore barrel, and ghost ring sights are all well suited to defensive work, and the platform has decades of proven reliability behind it. At around 7.25 pounds it soaks up 12 gauge recoil better than lighter budget guns, too.
| UPC | 015813516631 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 51663 |
| Action | |
| ATF Type | Shotgun |
| Barrel Length | 20" |
| Caliber/Gauge | 12 Gauge |
| Capacity | 8 + 1 |
| Chokes Included | Cylinder Bore |
| Color | Black |
| Length | 42.75 |
| Model | |
| Package Height | 7.75 |
| Package Width | 2.25 |
| Product Type | Shotgun |
| Shipping Weight | 9.1 |
| Sights | Ghost Ring |
| Sights Type | Adjustable Sights |
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