GunsAmerica

Quick Look

The Mossberg 590A1 was developed from the U.S. military's request for a rugged, combat-ready shotgun based on the classic 500 platform. Built for durability and reliability, it features heavy-walled barrels, metal trigger guards, and tactical furniture. Today, it is a top pick among law enforcement and home-defense users seeking maximum performance in pump-action shotguns.

Why It's a Top Choice

Built to MilSpec 3443E standards
Heavy-walled barrel for enhanced durability
Simple, ultra-reliable pump-action operation
Parkerized finish resists corrosion
Excellent aftermarket support

Key Variants

590A1 20-inch

Ideal for duty or home defense; balances maneuverability with capacity.

590A1 Retrograde

A wood-stocked throwback for collectors or traditionalists who want modern reliability.

590A1 SPX

Adds ghost ring sights and a bayonet lug for enhanced tactical use.

Competitor Comparison Table

Feature	590A1	Remington 870 Police	Benelli M4
MSRP	$600–$900	$700–$900	$1,900+
Capacity	8+1 (20\" barrel)	6+1	5+1
Weight	Around 7.25 lbs	Around 7.0 lbs	Around 8.4 lbs
Optics-Ready	No (standard), rail optional	No	Yes (Picatinny rail)
Trigger Type	Standard curved	Standard curved	Semi-auto only
Notable Pro	Built to military spec	Classic aftermarket availability	Semi-auto reliability
Notable Con	Heavier than standard pump guns	Less rugged for harsh environments	High price point

Best Use Cases

Home defense
Law enforcement duty weapon
Ranch and property security
Shotgun training and qualification
Military collectors

FAQs

What is the difference between the Mossberg 590 and 590A1?

The 590A1 uses a heavier barrel, metal trigger guard, and safety, making it MilSpec compliant.

Can I mount a bayonet on a 590A1?

Yes, select 590A1 models like the SPX feature a bayonet lug compatible with M9-type bayonets.

How does the Mossberg 590A1 perform with slugs?

It handles rifled slugs well for close ranges. Use ghost ring sights for better accuracy.

590A1 for Sale