Mossberg 590 Shockwave SPX 12 Gauge Pump-Action Shotgun – Heavy-Walled Barrel, Heat Shield & 14.375-Inch Breacher Muzzle
The 590 Shockwave SPX packs Mossberg’s proven duty-grade 590 action into a compact, NFA-exempt platform that measures just 26.37 inches overall. A heavy-walled 14.375-inch barrel with heat shield, stand-off (serrated) breacher muzzle, and cylinder bore delivers rugged performance, while the Raptor bird’s-head grip and strapped corncob forend keep recoil manageable in tight spaces. This factory SPX variant adds a receiver shell saddle and optics-ready top drill-and-tap, giving buyers a feature-rich defensive tool straight from the box.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: This firearm displays only faint handling marks on the receiver and barrel surfaces, and the bore remains bright and free of fouling.
What’s Included
- Mossberg 590 Shockwave owner’s manual
- Factory Mossberg cardboard box
The Shockwave SPX’s 3-inch chamber feeds a 4+1 magazine, giving users the flexibility to run standard or magnum 12-gauge shells. Dual action bars, a steel‐pinned bolt, and a 7075-T6 aluminum receiver anchor the same internals trusted by military and law-enforcement 590s.
A carbon-steel, heavy-walled barrel wears a factory heat shield to disperse heat during rapid strings of fire. The serrated standoff breacher muzzle helps defeat barriers while protecting the crown, and its true cylinder bore provides consistent patterns with a variety of defensive loads.
Handling is enhanced by the Raptor bird’s-head grip, which promotes a natural wrist angle, and a ribbed polymer corncob forend with an integral strap that keeps the support hand in place under recoil. An ambidextrous tang safety, bottom loading/ejection, and drilled-and-tapped receiver for optics or a rail reflect thoughtful, user-focused design.
The low-profile brass bead front sight offers a clear, snag-free aiming point, and the integral side shell saddle keeps extra rounds immediately accessible. Finished in matte black anodizing and blued steel, the SPX matches contemporary tactical gear while resisting glare and corrosion.