Mossberg 990 AfterShock 12 Gauge 18.5in Semi-Auto

About this product

The Mossberg 990 AfterShock is a compact 12-gauge semi-automatic platform designed for maneuverability and functional features. It pairs an 18.5-inch barrel with a gas system that includes corrosion-resistant internals for reliable cycling. The shotgun is outfitted with an AfterShock pistol grip and a strapped forend with integrated M-LOK slots for accessory mounting. Built with a matte blued, chrome-lined barrel and black synthetic furniture, it balances durability and control for close-quarters applications.

Key Specifications

• The action is Semi-Auto.
• Chambered for the 12 Gauge.
• The barrel measures 18.5 inches for compact handling.
• Magazine capacity is 5+1 rounds.
• Features a gas system with corrosion-resistant internals including a nickel boron-coated piston.
• The barrel has a Matte Blued finish on chrome-lined steel.
• The stock and grip are black synthetic with an AfterShock pistol grip design.
• Equipped with a fiber optic front sight.
• Includes a 5-round magazine tube and uses a tubular magazine.
• The forend includes M-LOK mounting slots for accessory attachment.

With its compact profile, corrosion-resistant gas components, and M-LOK-ready forend, the 990 AfterShock offers practical functionality and straightforward ergonomics for users who value maneuverability and modularity. The combination of a short barrel, AfterShock grip, and ambidextrous controls makes it a versatile option for close-quarters applications where a reliable, easy-to-handle shotgun is preferred.

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