In a firearms world dominated by the AR platform, we shotgunners often feel left out. Seeing the AR guys get any gun they want in any size they want makes me jealous. With the abolition of the $200 tax stamp fee, the draw of short-barreled everything is in full effect. Obtaining semi-auto short-barreled shotguns seemed tough until Mossberg hit us with the 990 Magpul.
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Magpul is building on its 990 lineup by doing the most natural thing it could: adding a stock. The 990 Aftershock premiered as a short-barreled, pistol-grip-only, 12-gauge firearm. The gun concealed the gas system entirely under the handguard, which allowed the gun to be compatible with Mossberg 500/590 stocks.
The natural evolution of this platform was to produce a factory short-barreled, semi-automatic shotgun, and that is exactly what Mossberg did. Not only that, but they also produced a non-short-barrel configuration with an 18.5-inch barrel.
What‘s Up Magpul?
The 990 Magpul is a semi-automatic, gas-operated 12-gauge shotgun with a 14.75-inch or 18.5-inch barrel. The shorter version has a capacity of 5+1, and the longer variant has a capacity of 7+1. Both are SPX models, which means they feature the fantastic SPX handguard.
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This handguard not only provides a solid mounting space for a light via M-LOK slots, but also incredibly aggressive texturing that allows for a no-slip grip when you engage the old push/pull method of recoil reduction.
The handguard encapsulates a good portion of the barrel, which means there is tons of room to grip the gun without the risk of burning your thumbs. For a defensive engagement, that is not a big problem, but for training, shotgun barrels get toasty quick.
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If we dive back to the rear end of the gun, we have the beloved Magpul SGA stock. This is a stock that most people agree is the best tactical shotgun stock on the market. It allows the user to adjust the length of pull with ease and provides a unique grip point. It is raked aggressively, almost like a pistol grip, but it flows into a standard stock.
This provides a grip that can support the weight of the gun with a single hand while delivering classic shotgun speed. The combination of the SPX forend and the Magpul rear makes this the shotgun to beat. If, for whatever reason, you feel the need to swap stocks, the entire Mossberg 500/590 family of stocks is an option.
More Than Furniture
The 990 Magpul comes with massive controls. The bolt release is huge, the safety is the Gen 2 style tang safety, and the charging handle is quite large. This all translates to a gun that clicks and pops when you want it to. The controls are easy to engage and utilize.
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Up top, we have a fixed ghost ring sight that can be removed to access an RMSc direct mount plate. You can also field a variety of plates to accommodate every major mini red dot. The receiver is also drilled and tapped for a rail or any red dot you might want.
The front sight is a high-visibility rifle-type blade that is bright enough that you certainly do not need a dot to be successful. A barrel clamp device provides an M-LOK slot for a sling, and the SGA stock offers plenty of options for sling mounting. It is an incredibly solid tactical shotgun.
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Shooting the 990 Magpul
At Rendezvous 2026, I got my first bit of trigger time with the 990 Magpul SBS. As a tactical shotgun fanatic, I was incredibly excited to throw some birdshot downrange. Every time the line eased up, I was back to do it again.
I could not shoot enough for a full review, but I do have some initial thoughts. First, the gun runs like an absolute beast. It saw a ton of shooters and cases of ammo without a single malfunction. It cycled through the light-loaded Federal Top Gun repeatedly.
Recoil was light, which we expect from birdshot and a gas gun. At 10 yards, I could put two rounds on target in less than a second, often close to three-quarters of a second for two rounds. The gun wore irons, and when aimed at the A-zone, the front sight did not even leave the target between shots, allowing for those fast splits.
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It handled well, and the big controls made operating it in cold weather with gloves quite easy. The 990 Magpul left a hell of an impression, and I am excited to test it out in the coming months. Watch this space to see how the Mossberg 990 Magpul performs when put through a long-term test.