Mossberg 990 Aftershock

About the Mossberg 990 Aftershock

The Mossberg 990 Aftershock is a compact, non-NFA 'firearm'-class 12-gauge gas-operated semi-automatic built on the 990 platform with a bird's-head AfterShock grip in place of a shoulder stock. Its 14.75-inch barrel and ~26.5-inch overall length keep it under federal shotgun classification while the self-loading gas system, contained within the forend, cycles 2.75-inch shells from a 5-round tubular magazine. It ships optic-ready with a Shield RMSc footprint, fiber-optic front sight, heat shield, M-LOK slots and QD sling ports.

The AfterShock takes Mossberg's pump-action Shockwave concept and adds a gas-operated semi-auto action, giving the bird's-head 'firearm' a soft-recoiling self-loading punch that fires as fast as you can pull the trigger from the hip.

Mossberg 990 Aftershock specifications

Classified by ATF as a 'firearm' (not a shotgun or SBS) because it was never configured with a shoulder stock, paralleling the pump-action Mossberg Shockwave. Gas system uses nickel boron-coated piston, hammer and sear. Capacity is 5 rounds in the tube.