The Mossberg 500 Mariner JIC in 12 gauge (brand part no. 52340) is a pump-action firearm built around an 18.5-inch cylinder-bore barrel, finished in a corrosion-resistant silver Marinecote coating with a rugged synthetic pistol-grip stock rather than a shoulder stock, keeping it factory-classified as a standard firearm. Mossberg builds the Mariner JIC (‘Just In Case’) as a marine-ready package with a bead front sight for fast target acquisition. Among pump shotguns in the pump action shotguns category, the Mariner JIC favors boaters and marine-environment shooters who need corrosion resistance in a compact package.

Key Specifications

• Chambered in 12 gauge.
• Operates as a pump-action firearm.
• Features an 18.5-inch cylinder-bore barrel.
• Feeds from a tubular magazine with a 5+1 capacity.
• Equipped with a bead front sight.
• Runs a tang safety.
• Finished in corrosion-resistant silver Marinecote.
• Built with a synthetic pistol-grip stock.
• Officially classified as a pistol-grip firearm, not a regulated short-barreled shotgun.
• Overall length is 36.45 inches.
• Ships at approximately 12.6 pounds.

Frequently Asked Questions

Why is it Marinecote-finished? The corrosion-resistant coating protects it in marine and saltwater environments.

Is this an NFA-regulated item? No. It ships with a pistol grip rather than a shoulder stock, keeping it classified as a standard firearm.

Buy the Mossberg 500 Mariner JIC 12 Gauge

Corrosion resistance in a compact package is exactly what the Mariner JIC delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.