Mossberg 590A1 Tactical 12GA 18.5" M-LOK Marinecote 6+1

The Mossberg 590A1 Tactical delivers military-proven reliability in a configuration optimized for tactical applications and home defense. This 12-gauge platform combines the proven 590A1 action with modern M-LOK mounting capabilities and corrosion-resistant Marinecote finish.

What Makes This Different

The 590A1 stands apart from standard shotguns through its heavy-walled barrel construction and metal trigger guard assembly, meeting military MIL-SPEC 3443G standards. The Marinecote finish provides superior corrosion resistance compared to standard parkerizing, extending service life in harsh environments. The integrated M-LOK handguard system allows direct accessory mounting without additional rail sections.

Key Features

• 18.5-inch heavy-walled barrel with cylinder bore choke for maximum versatility
• 6+1 capacity with 3-inch chamber capability for both 2¾" and 3" shells
• M-LOK compatible handguard for lights, grips, and other tactical accessories
• Marinecote finish on receiver provides enhanced corrosion protection
• Dual extractors and positive steel-to-steel lockup ensure reliable cycling
• Ghost ring sights with protective wings for rapid target acquisition
• Black synthetic stock with textured grip surfaces for secure handling

Field performance demonstrates consistent cycling across ammunition types from light target loads to heavy 3-inch magnum shells. The cylinder bore configuration accepts standard and specialty ammunition including buckshot, slugs, and less-lethal rounds. Weather testing confirms reliable operation in temperatures from -20°F to 140°F with the Marinecote finish showing minimal wear after extended exposure to salt spray conditions.

Technical Specs

• Gauge: 12-gauge with 3-inch chamber
• Barrel Length: 18.5 inches, heavy-walled construction
• Overall Length: 39.5 inches
• Weight: 7.25 pounds
• Capacity: 6+1 rounds
• Action: Pump-action with dual extractors
• Stock: Black synthetic with 14-inch length of pull
• Finish: Silver Marinecote receiver, matte black barrel and furniture
• Sights: Ghost ring rear, winged front post
• Safety: Tang-mounted ambidextrous
• Made in USA with limited warranty

This configuration represents the evolution of the proven 590A1 platform with modern tactical enhancements. The combination of military-grade construction and contemporary mounting options delivers a shotgun ready for professional use straight from the box.