Mossberg 590 Shockwave 12 Gauge, 14.375-Inch Barrel, 3" Chamber, Cylinder Bore, Matte Black
This Mossberg 590 Shockwave stands out with its compact 14.375-inch steel barrel, 3" chamber, and Cyl Bore configuration for straight, even patterns. It features a brass-bead front sight, a ribbed corncob-style fore-end with a web strap embroidered "Mossberg," and the familiar top-tang safety. The aluminum-alloy receiver is matte black, right-side ejection/loading, and drilled and tapped on top with three plug screws. Capacity is 4+1, and it is made in the United States.
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: Light handling marks from prior use are present. See the photos for close-ups.
What's Included
- No case included
The 14.375-inch barrel pairs a true Cyl Bore with a brass-bead front sight for fast alignment and consistent shot dispersion. The 3" chamber also accepts 2 3/4" shells, offering broad load compatibility without changing the platform’s compact form factor.
The receiver is drilled and tapped at the top with three plug screws, providing a clean, finished surface out of the box. Right-side ejection and loading keep operation familiar, while the under-barrel tubular magazine with a clean-out cap simplifies maintenance. A forward sling-swivel stud is fitted to the magazine cap.
Furniture includes a bird's-head polymer grip and a ribbed polymer fore-end with a web strap embroidered "Mossberg" for a secure, repeatable grip. The uniform matte-black finish extends across the barrel and aluminum-alloy receiver for a cohesive, low-glare profile.
Controls are straightforward with Mossberg’s top-tang safety. The platform is pump-action with a noted 4+1 capacity, built on a steel barrel and lightweight alloy receiver for durability and balance. Made in the United States.

