The Mossberg 990 Aftershock SPX is a compact, semi-automatic 12-gauge shotgun engineered for defensive and close-quarters applications. It pairs a short 18.5-inch barrel and a 3-inch chamber with an optic-ready receiver and a fiber-optic front sight. The design emphasizes maneuverability and functional features for practical use.
Key Specifications
- The gauge is 12 Gauge.
- The barrel measures 18.5 inches.
- The chamber accepts shells up to 3 inches.
- The action type is Semi-Auto.
- The barrel features an integrated heat shield.
- The listed weight is 6.29 lbs.
- The overall length is 30.88 inches.
- The firearm is equipped with a fiber optic front sight.
- The barrel material is steel.
- The receiver is drilled & tapped with a Shield RMSc footprint for optics.
Purpose-built for informed users who value compact, function-forward equipment, the 990 Aftershock SPX combines practical defensive features with a short-barrel profile and an optic-ready platform. Its control enhancements and modular mounting options make it suited for users who want a nimble, adaptable shotgun for close-range applications.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




