The Mossberg 590S in 12 gauge (brand part no. 51605) is a pump-action shotgun built around an 18.5-inch barrel with flexible ammunition cycling, capable of running 1.75-inch, 2.75-inch, or 3-inch shells interchangeably. Mossberg finishes the 590S in matte blued steel with an optic-ready receiver and a fixed black synthetic stock, and equips it with dual extractors, twin action bars, and a top-mounted ambidextrous safety. Among pump-action shotguns in the pump-action shotguns category, the 590S favors shooters who want shell-length flexibility with a mounting platform ready for a red dot.

Key Specifications

• Chambered in 12 gauge.
• Cycles 1.75-inch, 2.75-inch, and 3-inch shells interchangeably.
• Operates as a pump-action shotgun.
• Features an 18.5-inch barrel.
• Feeds from a magazine tube with a 9+1 capacity.
• Runs a tang safety.
• Equipped with a fixed bead front sight.
• Includes a Fixed Cylinder choke.
• Receiver is optic-ready.
• Built with a fixed black synthetic stock.

Frequently Asked Questions

What shell sizes can this cycle? 1.75-inch mini shells, 2.75-inch standard shells, and 3-inch magnum shells, interchangeably.

Is the receiver optic-ready? Yes, it accepts a red dot or other optic without additional gunsmithing.

Buy the Mossberg 590S 12 Gauge Optic-Ready

Shell-length flexibility with a mounting platform ready for a red dot is exactly what the 590S delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.