The Mossberg 990 AfterShock in 12 gauge (brand part no. 83003) is a semi-automatic firearm built around a 14.75-inch barrel and an ultra-compact, easy-to-maneuver platform, delivering 5+1 semi-auto convenience with tactical features in a bird’s-head-grip package. Mossberg equips it with the signature AfterShock grip for a firm hold that minimizes felt recoil, an ambidextrous safety, a fiber optic sight, and a cylinder bore choke, feeding from a detachable 5-round box magazine. Among pump-action shotguns, the 990 AfterShock is actually a semi-automatic action, not pump-action, favoring shooters who want fast, recoil-managed follow-up shots in a compact firearm.

Key Specifications

• Chambered in 12 gauge.
• Operates as a semi-automatic firearm, not pump-action.
• Features a 14.75-inch barrel.
• Holds 5 rounds via a detachable box magazine.
• Runs an ambidextrous safety.
• Equipped with a fiber optic sight.
• Includes a cylinder bore choke.
• Built with the signature AfterShock pistol grip to minimize felt recoil.
• Overall length is only 27.125 inches.
• Ships at approximately 7.9 pounds.

Frequently Asked Questions

Is this pump-action or semi-auto? It’s genuinely semi-automatic — the AfterShock cycles itself, unlike Mossberg’s pump-action lines.

What does the AfterShock grip do? Provides a firm hold that minimizes felt recoil in this ultra-compact platform.

Buy the Mossberg 990 AfterShock 12 Gauge

Fast, recoil-managed semi-auto follow-up shots in a compact firearm is exactly what the 990 AfterShock delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.