Mossberg 590M Mag-Fed, the shotgun with double-stack magazine

Mossberg shows how even a 12 gauge shotgun can be revolutionary – well, a bit. The new Mossberg 590M Mag-Fed 12-gauge shotgun is built on a Mossberg classic pump-action. What makes it a totally different platform is its detachable double-stack 10-round  magazine - a world’s first - with optional 5, 10, 15 and 20-round capacity magazines sold as accessories.

Mossbergs seems to have overcome the age-old problem of reliably stacking rimmed shells. And having at disposal full 20-round interchangeable magazines of 12-gauge shells is a big leap forward in terms of shotgun flexibility, allowing for a quick transition from a target load, to buckshot, slugs, or less lethal. 

Mossberg 590M for home security, tactical and competitive applications

The 590M is a 12-gauge 2.75-inch pump-action shotgun featuring non-binding twin action bars, an anti-jam elevator, dual extractors, an anodized aluminum receiver drilled and tapped for adding optics, a heavy-walled barrel, and an ambidextrous top-mounted safety. This gun is designed for home security, tactical and competitive applications and with the included 10-round magazine it boasts a total round capacity of 10+1.

Its core, the detachable double-stack magazine, has a self-lubricating polymer body and is constructed with hardened-steel feed lips, over-molded steel shell ramps and an anti-cant, rounded follower to ensure reliable feeding. It is located at the center of gravity point and has integral stabilizing ribs which engage the magazine directly to notches engineered into the receiver, ensuring a positive lock-up. The magazine release button and housing are positioned in front of the trigger guard for quick, ambidextrous unloading and reloading. The location of the mag release does not interfere with the cycling of the action.

The Mossberg 590M is offered in two versions, the base-model Mag Fed 10-Round and the 590M Mag Fed Tri-Rail 10-Round. The first features an 18.5-inch, heavy-walled cylinder bore barrel; bead sight; black synthetic stock and forend; matte blue metal finishes; and 10-round, double-stack magazine. Its recommended price is 721 USD.

The 590M Mag Fed Tri-Rail 10-Round offers greater versatility thanks to its Tactical Tri-Rail forend with full-length bottom rail and dual side rails for easy attachment of lights and accessories. The 18.5-inch heavy-walled barrel has interchangeable ACCU-CHOKE choke tube system (cylinder bore tube included). A protective heat shield, a Ghost-Ring sight and black synthetic stock and forend, together with matte blue metal finishes, complete the package at 801 USD, shipped with a 10-round, double-stack magazine.

Mossberg 590M Mag-Fed: technical data

Model:590M Mag-Fed
12 – 2.75 chamber
Barrel length:
18.5 in / 469 mm
Overall length: 
39.5 in / 1003 mm
7.75 lbs / 3500 g
Magazine capacity:
5, 10, 15 or 20 rounds
double-stack detachable magazine 
721 USD / 585 euro (590M Mag Fed 10-Round model)  801 USD / 650 euro (590M Mag Fed Tri-Rail 10-Round model)

Mossberg introduced also the 590 Shockwave at SHOT Show 2018.

For more information please visit Mossberg website.

All news of the SHOT Show 2018 can be found right here at

This article is also available in this language: