NORTH HAVEN, CT – Following on the unprecedented success of the Mossberg 590® Shockwave pump action, Mossberg is pleased to announce the all-new 990 Aftershock, a 12-gauge, 3-inch semi-auto ...

New for 2025, Mossberg is adding another “Other” to its catalog with the 990 Aftershock. The 990 Aftershock is a semi-automatic version of the Shockwave “Other” firearms pioneered by Mossberg.