Mossberg 590S 12 Gauge Optic-Ready Shotgun, 18.5 in Barrel

The Mossberg 590S is a 12 gauge pump-action shotgun with an 18.5-inch matte blued barrel and black synthetic stock. Its chamber cycles 1.75-inch, 2.75-inch, and 3-inch shells, including mixed shell lengths, without requiring a mini-shell adapter. The receiver is optic-ready and includes a cover plate when an optic is not installed.

Standard features include dual extractors, twin action bars, steel-to-steel lockup, an anti-jam elevator, and a top-mounted ambidextrous safety. The shotgun also includes a bead front sight and a fixed synthetic stock.

Key Specifications

• The firearm uses 12 gauge shotshells.
• The action type is pump-action.
• The barrel measures 18.5 inches and has a matte blued finish.
• The chamber cycles 1.75-inch, 2.75-inch, and 3-inch shells.
• The receiver is optic-ready and includes a cover plate when no optic is mounted.
• The shotgun features a bead front sight.
• The stock is a fixed black synthetic design.
• The safety is a top-mounted ambidextrous style.
• The overall length is listed as 39.5 inches.
• The listed firearm weight is 6.75 pounds.

With flexible shell compatibility, a practical pump-action layout, optic-ready receiver, and durable synthetic furniture, the Mossberg 590S provides a straightforward platform for range use and other lawful sporting applications.

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