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Mossberg

Mossberg 590A1 Pump Action 12 Gauge 20" Barrel 9+1 Rounds

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Pump-action 12-gauge

A 20-inch barrel and 9+1

Home Defense

Security use

Built Mil-spec

Standards and previously offered to

Heavy-walled Barrel

Is described as helping decrease

Metal Trigger

Guard and safety

$688.99
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SKU: WX2*0638131

Overview

Built for home defense and security use, this 12-gauge pump-action shotgun is presented as a practical option for responding to serious threats around the house. The 20-inch barrel, 9+1 capacity, and cylinder bore choke give it a straightforward configuration suited to close-range defensive roles. Mossberg also notes features such as a heavy-walled barrel, metal trigger guard, dual extractors, twin action bars, and an anti-jam elevator, along with drilled-and-tapped receiver provisions for scope mounts and swivel studs. It is a purpose-driven shotgun with a no-nonsense layout, though its focus is clearly on defensive use rather than general-purpose versatility.

Why Hunters Choose the Mossberg

Pump-action 12-gauge

Platform suited for home defense

Built Mil-spec

Specifications previously used by law

Heavy-walled Barrel

Is described as helping decrease

Metal Trigger

Guard and safety add durable

Dual Extractors,

Twin action bars, and anti-jam

Key Features

  • Pump-action 12-gauge shotgun with a 20-inch barrel and 9+1 round capacity.
  • Designed for home defense and security use.
  • Built to Mil-spec standards and previously offered to law enforcement and military organizations.
  • Heavy-walled barrel is described as helping decrease recoil.
  • Features a metal trigger guard and safety.
  • Includes dual extractors, twin action bars, and an anti-jam elevator.
  • Drilled and tapped for scope mounts, with swivel studs and a recoil pad.

Best Used For

  • Home defense users seeking a pump-action 12-gauge configured for security needs.
  • Hunters or shooters wanting a shotgun built to Mil-spec standards.
  • Owners who prefer a heavy-walled barrel and recoil pad for reduced felt recoil.
  • Users needing a drilled-and-tapped shotgun for scope mount compatibility.
  • Shooters who value dual extractors, twin action bars, and an anti-jam elevator.

Specifications

ActionPump Action
Action BarsTwin action bars
BarrelHeavy-walled barrel
Barrel Length20"
Capacity9+1 Rounds
ChokeCylinder bore
ElevatorAnti-jam elevator
ExtractorsDual extractors
Gauge12 Gauge
Lock UpPositive steel-to-steel lock-up
RecoilDecreased recoil
Recoil PadEquipped with recoil pad
SafetyMetal safety
Scope MountsDrilled and tapped for scope mounts
StandardsBuilt to Mil-spec standards
Swivel StudsEquipped with swivel studs
Trigger GuardMetal trigger guard

Pros

  • Pump-action 12-gauge platform suited for home defense and security use.
  • Built to Mil-spec standards with specifications previously used by law enforcement and military.
  • Heavy-walled barrel is described as helping decrease recoil.
  • Metal trigger guard and safety add durable control components.
  • Dual extractors, twin action bars, and anti-jam elevator support reliable operation.
  • Drilled and tapped for scope mounts, with swivel studs and recoil pad included.

Considerations & Trade-offs

  • The 20" barrel and 9+1 capacity make this a more specialized home-defense setup than a general-purpose field shotgun.
  • The heavy-walled barrel and recoil pad are included, but the product is still a 12-gauge pump action, so recoil management remains a practical consideration.
  • It is drilled and tapped for scope mounts, but optic mounting requires compatible hardware and setup beyond the base shotgun.
  • Cylinder bore choke is well-suited to the stated defensive role, but it limits versatility for users looking for more choke options.

Suggested Comparisons

  • Home defense shotguns
  • Pump-action shotguns
  • 12-gauge shotguns
  • Security shotguns

Suggested Accessories

  • Shotgun cleaning kit
  • 12 gauge ammunition storage
  • Weapon light
  • Sling

Frequently Asked Questions

What gauge and capacity does the Mossberg 590A1 have?

This model is a 12-gauge pump-action shotgun with a 9+1 round capacity, as listed in the product title.

Is the Mossberg 590A1 intended for hunting use or home defense?

The source data describes it primarily as a home defense and security shotgun. It does not specifically describe hunting use.

What features are listed for the 590A1?

The provided description lists a cylinder bore choke, heavy-walled barrel, metal trigger guard and safety, dual extractors, twin action bars, positive steel-to-steel lock-up, anti-jam elevator, drilled and tapped receiver for scope mounts, swivel studs, and a recoil pad.

Does this shotgun come ready for optics?

The description says it is drilled and tapped for scope mounts. It does not specify which mounts or optic system are included.

What should I know about the barrel and recoil-related features?

The description states that it has a 20-inch barrel and a heavy-walled barrel for decreased recoil. No further recoil performance details are provided.