Mossberg brings double stack mag 590M to SHOT Show (PHOTOS)

01/23/18 8:00 AM | by

Mossberg brings double stag mag 590M to SHOT Show (PHOTOS)

Mossberg points out that their new 590M series, shown with a 20-round mag inserted above, allows for quick reloading in a smaller package than the other guys' single-stacks (Photos: Chris Eger/Guns.com)

Mossberg points out that their new 590M series, shown with a 20-round mag inserted above, allows for quick reloading in a smaller package than the other guys’ single-stacks. A pair of 10-round mags, standard to the shotgun, are seen to the left (Photos: Chris Eger/Guns.com)

The newest scattergun line under Mossberg’s sunny skies adds detachable five-, 10-, 15- and 20-round capacity magazines to its tried-and-true 590 pumps.

Shown off at Industry Day on Monday in the pre-game event for SHOT Show proper was the new Mossberg 590M mag-fed 12-gauge line featuring a patented double-stack magazine in various sizes.

The shotguns themselves use 18.5-inch barrels and are available in two different flavors — a basic cylinder bore for $721 and or with an Accu-Choke, heat shield and ghost ring sights for $821– each with a 10-round magazine included. Optional mags range from $101-$140 depending on size.

The 5-round magazine is a tad over 5-inches high and weighs just under a pound.

The 5-round magazine is a tad over 5-inches high and weighs just under a pound.

The 20, unloaded, is about as long as a meatball sub and weights 1.7-pounds.

The 20, unloaded, is about as long as a meatball sub and weights 1.7-pounds.

The 5 and 20 rounders stacked up against each other.

The 5 and 20 rounders stacked up against each other. For comparison, Izmash-marked Saiga 8-round single stacks are about 9-inches long.

Designed for use with 2.75-inch shells only, the mags are polymer with a self-lubricating body, hardened steel feed lips, and integral stabilizing ribs. A removable floor plate allows for cleaning while the springs are music wire.

5, 15 and 20, with the last just a tad shorter than the stock of the 590M. Missing from the family portrait: the 10 round standard mag

5, 15 and 20, with the last just a tad shorter than the stock of the 590M. Missing from the family portrait: the 10 round standard mag

The mags are beefy, but Mossberg argues they are in a smaller envelope than competitors’ single-stack mags. For reference, the five-round mags are 5.375-inches high, the 10’s are eight-, the 15’s are 10.375-, and the 20s are a whopping 12.625-inches from floor plate bottom to the top of the feed lips.

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