Mossberg 590A1 Tactical M-LOK 12GA: MilSpec Pump Shotgun

Name: Mossberg 590A1 Tactical M-LOK 12GA: MilSpec Pump Shotgun
Brand: Mossberg
SKU: UCHGBrjf
Availability: InStock

The Mossberg 590A1 Tactical M-LOK 12GA: MilSpec Pump Shotgun is a 12 Gauge pump-action shotguns from Mossberg. It is available from 1 vendor at $999.99.

Mossberg 590A1 Tactical M-LOK 12GA: MilSpec Pump Shotgun - view 2

From $999.99

Product Information

Name: Mossberg 590A1 Tactical M-LOK 12GA: MilSpec Pump Shotgun

Brand: Mossberg

Category: Pump-Action Shotguns

Caliber: 12 Gauge

Barrel Length: 20"

Capacity: 8 rounds

UPC: 015813507691

SKU: UCHGBrjf

Description

The Mossberg 590A1 Tactical M-LOK is a 12-gauge pump-action shotgun with a 20-inch heavy-walled barrel, 8+1 capacity, and a black Parkerized finish over a synthetic frame. Weight is 7.75 lbs. It is the only pump-action shotgun to have passed MilSpec 3443E standards. The six-position adjustable stock sets length of pull between 10.5" and 14.25". Ghost ring sights are standard, and the M-Lok forend accepts accessories.

Key Specifications

Gauge: 12 GA
Action: Pump Action
Capacity: 8+1 Rounds
Barrel Length: 20 inches
Weight: 7.75 lbs.
Finish: Black Parkerized
Frame Material: Synthetic

Detailed Features

MilSpec 3443E Certified: The only pump-action shotgun rated to this standard, built to handle demanding conditions.
Ghost Ring Sights: Faster target acquisition than bead-only setups, useful at closer ranges and in low light.
Adjustable Stock (10.5"-14.25" LOP): Fits a wide range of body types and shooting positions.
M-Lok Forend: Standard M-Lok slots accept lights, grips, and slings without requiring dedicated adapters.
Heavy-Walled Barrel: Added barrel wall thickness improves durability under sustained use.

Complete Specifications

Caliber	12 Gauge
Model	590A1 M-Lok
Capacity	8 rounds
Magazines included	0
Barrel length	20"
Overall length	36.12"
Weight	124 oz
Action	Pump Action
Finish	Barrel Finish: Parkerized
Color	Black
Stock type	Adjustable
Stock material	Synthetic
Sights	Ghost Ring
Safety	Top Tang

Frequently Asked Questions

What gauge is the Mossberg 590A1 M-Lok?

The 590A1 M-Lok is chambered in 12 gauge.

Who makes the 590A1 M-Lok?

It is made by Mossberg.

What type of firearm is the 590A1 M-Lok?

It is a pump-action shotgun.

What is the barrel length of the 590A1 M-Lok?

The barrel is 20 inches long with a heavy-walled cylinder bore construction.

How many rounds does the 590A1 M-Lok hold?

It has an 8+1 round capacity.

Does the 590A1 M-Lok have an adjustable stock?

Yes. The six-position adjustable stock sets length of pull between 10.5 and 14.25 inches.

What sights come on the 590A1 M-Lok?

Ghost ring sights are standard on this model.

Where can I buy the Mossberg 590A1 M-Lok?

Compare current vendor offers on this page.

Customers Say

AI-generated insights derived from customer reviews and discussions on popular gun-enthusiast forums.

The 590A1 has a well-established reputation in the defensive and tactical community. Reliability under rough conditions is the defining trait owners cite most -- wet, dirty, or hard-used, the pump action keeps running. The M-Lok forend makes it easy to add lights and other accessories without a lot of fiddling. For new shotgun users, the pump mechanism is intuitive and the manual operation adds confidence in emergencies.

Weight at 7.75 lbs is on the heavier side, which some users find tiring in extended handling drills or when moving quickly. Price is a recurring discussion point -- some competing shotguns offer similar features at lower cost, though the MilSpec certification and Mossberg's track record factor into most buyers' reasoning. Ghost ring sights are consistently praised for improving target acquisition over standard bead setups. Overall sentiment is strongly positive.