Mossberg 990 Aftershock 12 Gauge Semi-Auto, 14.75 inch Barrel, Cylinder Bore, 5+1, Matte Blue
The Mossberg 990 Aftershock is a compact, gas-operated 12 gauge introduced in 2025 with a 14.75 inch cylinder-bore barrel and an overall length of 27.13 inches. It features nickel-boron treated internals, oversized controls, and a receiver-top Picatinny rail segment installed. This USA-made model balances fast handling with practical upgrades that matter in use.
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: Scratches and blemishes are present.
What’s Included
- Mossberg 990 Aftershock 12 Gauge semi-automatic shotgun
The 990 Aftershock uses a gas system contained forward under the forend, paired with a 14.75 inch barrel and cylinder bore for straightforward function. At 27.13 inches overall and approximately 6.0 lb, it offers a compact, maneuverable package with a 3 inch chamber.
User-focused controls include an oversized, knurled charging handle and an oversized paddle-style bolt release. An enlarged loading port with an elongated elevator speeds topping off the extended 5-shot magazine, which provides a 5+1 capacity with 2.75 inch shells and incorporates an orange anodized follower for visibility.
Sight and mounting features are practical and ready to use: an LPA red fiber-optic front sight and a receiver-top Picatinny rail segment installed. The extended magazine includes an integrated M-LOK adapter for attaching compatible accessories. The safety is the familiar top-tang style with a red indicator.
Durability touches include nickel-boron treatment on the gas piston, magazine tube, hammer, and sear, with a matte blue finish on external metal. The black synthetic Aftershock bird’s-head grip and textured polymer forend with a webbed strap provide a secure hold. Receiver markings read "MOSSBERG 990 12GA / NORTH HAVEN, CT USA." Mfg part number is 83001, and MSRP is $1,120.