Mossberg 990 AfterShock 12 Gauge Gas-Operated Semi-Auto Shotgun, 14.75 in Cylinder-Bore Barrel, 5+1, Matte Blue
The Mossberg 990 AfterShock is a U.S.-made, gas-operated 12 gauge built around a short 14.75 in cylinder-bore steel barrel and a matte blue finish. It accepts both 2 3/4 in and 3 in shells, runs a 5+1 capacity, and features a red fiber-optic front bead for quick sight reference. Introduced in 2025 and cataloged as MPN 83001, it pairs compact overall dimensions with purpose-built controls and furniture, including strapped polymer grips and an enlarged loading port.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: The exterior shows a few minor, superficial scratches and small blemishes. The bore presents a clean, shiny, mirror-like surface.
What's Included
- Mossberg 990T 'AfterShock' autoloading firearm owner's manual
- Mossberg factory cardboard box
This Model 990 AfterShock uses a gas-operated action and a right-side bolt-release paddle, complemented by a knurled charging handle for positive control. The loading port is enlarged and beveled to ease loading.
The furniture is purpose-built: an AfterShock rear grip with an adjustable strap and a strapped synthetic forend provide a secure, consistent hold. The cylinder-bore, matte-finished steel barrel keeps the setup straightforward and durable.
Sighting is simple and direct with a front red fiber-optic bead. A top-tang safety offers an intuitive, ambidextrous-friendly location. Chambering covers both 2 3/4 in and 3 in 12-gauge shells, with a factory-listed 5+1 capacity.
Additional factory details include a magazine-tube extension clamp with M-LOK-style slots, an overall length of approximately 27.125 in, and a listed weight of about 6 lb. The receiver is marked "NORTH HAVEN, CT USA." This current-production configuration debuted in 2025 with an MSRP of $1,120.