Mossberg 590S Shockwave 12 Gauge, 18.5 inch Barrel, Matte Black, Raptor Birdshead Grip
This Mossberg 590S Shockwave (SKU 51600) stands out for its ability to run 1.75, 2.75, and 3 inch 12-gauge shells interchangeably without adapters, paired to an 18.5 inch smoothbore barrel and the compact Raptor birdshead pistol grip. It is a recent 590S-series variant with robust internals, a clean, shiny bore, and thoughtful factory features that add real utility.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: Little signs of prior use. The firearm is in excellent condition and the bore is clean and shiny.
What’s Included
- Mossberg factory cardboard box with model label (SKU 51600)
- Mossberg 500/590/590S Shockwave pump-action owner's manual
- US PeaceKeeper shotgun sheath/scabbard (black)
The 590S action is engineered to cycle 1.75, 2.75, and 3 inch shells interchangeably, expanding load flexibility across minishells, standard, and magnum offerings. Factory capacity specs are 9+1 with 1.75 inch, 6+1 with 2.75 inch, and 4+1 with 3 inch shells, giving the user clear, shell-length-specific options.
The 18.5 inch steel barrel is a smoothbore with a fixed Cylinder Bore and a brass bead front sight for fast alignment. The aluminum alloy receiver wears a matte black anodized finish and is factory drilled and tapped on top.
Controls and internals emphasize reliability: dual action bars, dual extractors, and Mossberg's tang safety. A clean-out magazine tube with a knurled end cap simplifies maintenance between range sessions.
Ergonomics are pure Shockwave, with a black synthetic Raptor birdshead pistol grip featuring a rear sling stud and a ribbed forend in matching black synthetic, without a strap. The overall matte black finish keeps glare down while maintaining a purposeful, uniform look. Made in the United States with Mossberg's 590-series durability, this 590S Shockwave is a practical, recent-production configuration with thoughtful factory details.