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Don't call it a "shotgun" — or a "pistol!" The Mossberg 990 Aftershock is a compact, hand-held semiautomatic firearm with a 5+1 capacity for 12-gauge loads. Inspired by the success of the new-for-2017 pump-action 590 Shockwave, Mossberg engineers went to work on developing a gas system unique to the short-barreled, gas-operated system required for the 990 Aftershock. It is certainly portable but is it simply a trend or a useful self-defense tool in close-quarter environments?
James Tarr reviewed the Mossberg 990 Aftershock for Guns & Ammo's October 2025 issue. Tarr was joined by Mossberg's Senior Director of Marketing Richard Kirk, Guns & Ammo's Managing Editor Jack Oller, and Editor-in-Chief Eric R. Poole, to report on his range experience and to seek more information about the evolution leading to one of the most versatile firearms on the market.
By Guns & Ammo Magazine5
33 ratings
Don't call it a "shotgun" — or a "pistol!" The Mossberg 990 Aftershock is a compact, hand-held semiautomatic firearm with a 5+1 capacity for 12-gauge loads. Inspired by the success of the new-for-2017 pump-action 590 Shockwave, Mossberg engineers went to work on developing a gas system unique to the short-barreled, gas-operated system required for the 990 Aftershock. It is certainly portable but is it simply a trend or a useful self-defense tool in close-quarter environments?
James Tarr reviewed the Mossberg 990 Aftershock for Guns & Ammo's October 2025 issue. Tarr was joined by Mossberg's Senior Director of Marketing Richard Kirk, Guns & Ammo's Managing Editor Jack Oller, and Editor-in-Chief Eric R. Poole, to report on his range experience and to seek more information about the evolution leading to one of the most versatile firearms on the market.

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