Mossberg 590 Shockwave 20 Gauge Pump, 14 in Heavy-Walled Cyl Bore Barrel, 3" Chamber, Matte Black
This Mossberg 590 Shockwave stands out with its compact, heavy-walled 14-inch cylinder-bore barrel and 3" Chamber, paired with the proven 590 pattern magazine system. It offers a 4+1 capacity with 3-inch shells (5+1 with 2 3/4-inch), an overall length of 26.37 inches, and a weight of about 4.95 lb. Notable features include the ambidextrous tang safety, a hard-anodized aluminum receiver, and a ribbed corncob fore-end with a factory strap.
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. Please refer to the photos for additional detail.
What's Included
- Owner's manual
- Black nylon shotgun scabbard/sheath with MOLLE webbing and D-ring
The Shockwave configuration delivers a compact 20-gauge package built around a heavy-walled 14-inch barrel with a Cyl Bore and a 3" Chamber. The steel barrel wears a matte black finish and is paired with a brass front bead for fast, simple alignment.
As a 590-pattern firearm, it uses an open-ended, fixed tubular magazine with a removable clean-out cap. Capacity is 4+1 with 3-inch shells and 5+1 with 2 3/4-inch shells, offering practical flexibility across common 20-gauge loads.
Controls and furniture are straightforward and robust: an ambidextrous, tang-mounted safety; a hard-anodized aluminum receiver; and a ribbed corncob fore-end with a factory-installed strap for confident cycling. The grip is a black synthetic bird's-head style designed for a secure, controlled hold.
Overall length is 26.37 inches and weight is about 4.95 lb, maintaining a balanced, maneuverable feel. This model is the 590 Shockwave in 20 gauge, finished in matte black, made in the United States, and identified by Mossberg part number 50657.