Mossberg 990 Aftershock SPX 12 Gauge Semi-Auto Shotgun

The Mossberg 990 Aftershock SPX is a 12-gauge semi-automatic shotgun configured for security-focused use. It has a 3-inch chamber, 5+1 capacity, Cerakote-finished metalwork, and a compact platform with an AfterShock grip.

The optic-ready receiver uses a Shield RMSc footprint and includes three additional adapter plates for RMR, Docter, and Leupold footprint optics. The forend incorporates an integrated heat shield, M-LOK accessory slots, and QD ports.

Key Specifications

• The gauge is 12 gauge for compatibility with 12-gauge shotshells.
• The action is semi-automatic for cycling successive shotshells.
• The chamber accepts shells up to 3 inches.
• The capacity is 5+1 rounds.
• The finish is Cerakote with a flat dark earth and black color scheme.
• The barrel features an integrated heat shield.
• The shotgun uses a cylinder bore choke configuration.
• The receiver is optic-ready with a Shield RMSc footprint.
• The front sight is a fiber-optic design with protective wings.
• The grip is made from black polymer and uses the AfterShock configuration.

With its optic-ready setup, practical mounting provisions, corrosion-resistant finish details, and compact security-oriented configuration, the 990 Aftershock SPX provides a focused platform for informed shotgun owners who value straightforward controls and adaptable equipment.

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