Mossberg 990 Aftershock 18.5″ 12 Gauge 5rd Semi-Auto Shotgun

The Mossberg 990 Aftershock is a new generation of tactical shotguns designed for serious shooters who demand reliability, power, and maneuverability. With its compact 18.5-inch barrel, semi-automatic action, and a host of modern tactical upgrades, this firearm is built for home defense, tactical training, and law enforcement needs. The 990 Aftershock is engineered with Mossberg’s legendary durability while offering features that set it apart from traditional shotguns, including the uniquely designed Aftershock Grip, integrated M-LOK® forend, and a smooth-operating gas system.

Key Features of the Mossberg 990 Aftershock 12 Gauge

• Gauge: 12 Gauge
• Action: Semi-Auto
• Capacity: 5+1 rounds
• Chamber: 2.75″
• Barrel Length: 18.5 inches
• Sights: LPA Fiber Optic Front Sight
• Choke: Cylinder Bore
• Grips/Forend: Aftershock Grip with Strapped Forend and M-LOK® Slots
• Overall Length: 30.875 inches
• Weight: 6.29 lbs

Small Size, Big Tactical Performance

The Mossberg 990 Aftershock is compact yet powerful, making it ideal for situations where maneuverability is critical. Its semi-automatic action provides rapid follow-up shots without the need to cycle a pump, giving shooters both speed and confidence. Despite its compact size, the 990 delivers 5+1 rounds of 12-gauge firepower, chambered for 2.75” shells, making it a serious contender for home defense or professional tactical applications.

Ergonomic Aftershock Grip & Enhanced Forend

One of the standout features of the 990 Aftershock is the uniquely designed Aftershock Grip, crafted for both recoil control and shooter comfort. With a rubberized palm pad, this grip minimizes felt recoil while ensuring a firm hold. The forend is equally functional, featuring Mossberg’s embossed strap for additional grip security and M-LOK® mounting slots on the sides and bottom. These slots allow users to add tactical accessories such as lights, lasers, or vertical grips, making the shotgun highly customizable.

Durable Gas System & Corrosion-Resistant Parts

Internally, the Mossberg 990 Aftershock is built for long-term reliability. It features a durable gas system with corrosion-resistant internal parts, including a nickel-boron coated gas piston, hammer, sear, and magazine tube. These components ensure smooth cycling and reliable function under demanding conditions. The enlarged and beveled loading port, along with the elongated elevator and anodized follower, further enhance loading speed and operational efficiency.

Precision Fiber Optic Sights

Equipped with an LPA fiber optic front sight, the 990 Aftershock allows for quick and precise target acquisition in a variety of lighting conditions. Whether you are training at the range or preparing for defensive use, the high-visibility sight makes aiming fast and intuitive.

Specifications: Mossberg 990 Aftershock Shotgun

Brand:	Mossberg
Model/Series:	990 Aftershock
Gauge:	12 Gauge
Action:	Semi-Auto
Capacity:	5+1 rounds
Chamber:	2.75″
Barrel Length:	18.5 inches
Sights:	LPA Front Fiber Optic
Choke:	Cylinder Bore
Grips/Forend:	Aftershock Grip / Strapped Forend with M-LOK®
Overall Length:	30.875 inches
Weight:	6.29 lbs

Why Buy the Mossberg 990 Aftershock?

• Semi-auto performance – faster follow-up shots than pump-action models.
• Compact & lightweight – easy to maneuver in tight spaces.
• Customizable with M-LOK® slots – attach lights, lasers, or other accessories.
• Durable gas system with corrosion-resistant internals – built for long-lasting reliability.
• Aftershock Grip design – reduces recoil and enhances shooter comfort.

Mossberg 990 Aftershock 12 Gauge for Sale

If you are searching for a Mossberg 990 Aftershock 12 Gauge Shotgun for sale, this semi-auto model delivers the perfect combination of size, power, and tactical performance. It is an excellent choice for home defense, tactical enthusiasts, and law enforcement professionals who need a shotgun that is fast, reliable, and adaptable. With Mossberg’s reputation for durability, the 990 Aftershock ensures you are always prepared.

Customer Review

“The Mossberg 990 Aftershock is an absolute powerhouse in a compact package. The semi-auto action is smooth, and the Aftershock Grip makes it very comfortable to shoot. Adding accessories with the M-LOK slots was a huge bonus for me. Highly recommend it for home defense.”

Order the Mossberg 990 Aftershock 18.5″ 12 Gauge Semi-Auto Shotgun today and experience Mossberg’s latest innovation in tactical shotguns.