Mossberg 590 Shockwave 12 Gauge Pump-Action, 14.375 in Heavy-Walled Barrel, Matte Black, 5-Round
This Mossberg 590 Shockwave stands out with its factory 14.375 in heavy-walled cylinder bore barrel, matte black finish, and proven 590-series action. It is chambered for both 2 3/4 in and 3 in shells and features the ambidextrous Mossberg tang safety. The receiver is marked "MOSSBERG NORTH HAVEN, CT U.S.A." and "590 12 GA," is drilled and tapped with filler screws, and pairs with a tubular magazine capped by a knurled clean-out. It comes with its factory box (SKU 50659, box pack date 04/24/2026) and an installed 6-loop elastic shell card.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: There are several light scuffs and scratches on the exterior surfaces.
What’s Included
- Mossberg factory cardboard box with end label (SKU 50659)
- Adhesive-backed 6-loop elastic shell card installed on the left side of the receiver (unbranded)
The heavy-walled 14.375 in steel barrel is factory roll-marked "CHAMBERED FOR 2 3/4 AND 3 IN. SHELLS 12 GA — 14 IN. CYLINDER BORE," pairing a short overall length with a true cylinder bore for versatile shot loads. A brass bead front sight provides a simple, durable aiming reference.
The 590-series action includes dual extractors, a steel-to-steel lock-up, an anti-jam elevator, and twin action bars. The pump-action runs a 5-round tubular magazine with a knurled clean-out cap for maintenance.
The anodized black aluminum receiver is marked "MOSSBERG NORTH HAVEN, CT U.S.A." and "590 12 GA," and its top is drilled and tapped with filler screws. The overall finish is matte black for reduced glare.
Controls and furniture are purpose-built: an ambidextrous tang safety, a ribbed corncob polymer forend for solid purchase, and a black synthetic bird’s-head (Raptor-style) grip with a rear sling swivel stud.
Factory details include SKU 50659 with a box pack date of 04/24/2026 and a matching serial noted on the box end label. An adhesive-backed 6-loop elastic shell card is installed on the receiver’s left side for convenient on-board shell carriage.