The 590 Mariner takes Mossberg's proven military-pattern pump gun and coats every metal surface in Marinecote, a nickel-based finish developed for saltwater environments. Boat owners, coastal residents and anyone who stores a shotgun in a humid garage have made it a favorite for exactly that reason. Underneath the finish it is a standard 590: heavy-walled 20-inch cylinder-bore barrel, dual extractors, twin action bars and the ambidextrous tang safety that makes Mossberg pumps so easy to run for left-handed shooters.

Chambered in 12 gauge, it handles buckshot and slugs with equal ease and remains one of the most trusted home and vessel defense shotguns available.

This firearm ships to your chosen FFL dealer for transfer. Order online from Dawson Defense, an Arizona-owned licensed dealer and importer.