Mossberg 590 Shockwave 20 Gauge Pump-Action — 14.375 inch Cylinder-Bore Barrel, 3 inch Chamber, Matte Black
The Mossberg 590 Shockwave in 20 gauge pairs a compact 14.375 inch fixed cylinder-bore barrel with a 3 inch chamber and 4+1 capacity. It features a synthetic birdshead (Raptor-style) grip, a ribbed corncob fore-end with a nylon strap embroidered "Mossberg," and a tang-mounted safety. A brass bead front sight, matte black finish, and a receiver top drilled and tapped with plug screws round out this USA-made pump-action configuration.
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: There are minimal markings from previous handling and use. The bore is bright and clean.
What’s Included
- Owner's Manual
This 590 Shockwave is chambered for both 2 3/4 and 3 inch 20 gauge shells and uses a 14.375 inch plain, fixed cylinder-bore barrel. Capacity is 4+1. The action is pump-operated with right-side ejection and a bottom loading port.
The synthetic birdshead (Raptor-style) grip provides a compact profile and includes a rear sling-swivel stud. Up front, the synthetic ribbed corncob fore-end is fitted with a nylon strap embroidered "Mossberg" for added purchase during cycling.
Sighting is straightforward with a brass bead front and no rear. The receiver top is drilled and tapped with plug screws installed, offering flexibility for those who choose to configure it further. Control layout includes a tang-mounted safety for intuitive access.
The alloy receiver and barrel wear a matte black finish for a uniform, low-glare appearance. Built in the USA, this Shockwave delivers the recognizable 590 pattern in a compact, smoothbore cylinder configuration with a 3 inch chamber.