The Mossberg 990 Aftershock is a semi-automatic 12 gauge shotgun purpose-built for home defense and close-quarters use. With an 18.5-inch barrel and a compact overall length, it delivers fast, reliable follow-up shots in the situations that matter most. The synthetic stock, matte blued finish, and fiber optic front sight make it equally at home in a truck safe or staged for home defense duty.
Key Specifications
- The action is semi-automatic, enabling rapid follow-up shots without manual cycling.
- Chambered in 12 gauge for maximum versatility across defensive and sporting loads.
- The barrel measures 18.5 inches in length, optimized for maneuverability in tight spaces.
- Overall length is 30.875 inches, keeping the platform compact and easy to handle.
- Capacity is 5+1 rounds, with one 5-round magazine included.
- The barrel features a matte blued finish that resists glare and provides corrosion protection.
- Fitted with an LPA fiber optic front sight for fast, accurate target acquisition in varied lighting.
- The safety is ambidextrous, accommodating both left- and right-handed shooters.
- Choke configuration is cylinder bore, ideal for defensive buckshot and close-range applications.
- Shipping weight is 8.15 pounds.
The Mossberg 990 Aftershock puts serious semi-auto performance into one of the most practical defensive shotgun packages on the market. The ambidextrous safety, fiber optic front sight, and cylinder bore choke reflect a purpose-driven design that requires no afterthought modifications out of the box. If you need a dependable 12 gauge that’s ready to work the moment you need it, the 990 Aftershock belongs on your short list.
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