Mossberg 590S | 12 Gauge | 20″ | Optic-Ready | 51604

The Mossberg 590S is a 12 Gauge pump-action platform built for operational flexibility and routine range use. It features an optic-ready receiver and cycles 1.75″, 2.75″ or 3″ shells interchangeably for broad ammunition compatibility. The shotgun pairs a 20″ matte-blued barrel with a fixed black synthetic stock and an Accu-Choke cylinder bore installed, offering a practical balance of handling and reliability. Standard Mossberg pump-action elements — dual extractors, twin action bars, and steel-to-steel lockup — support consistent function in demanding training or security roles.

Product Specifications

• The gauge is 12 Gauge.
• The action type is Pump-Action.
• The chamber size is 3 inches.
• The barrel measures 20 inches.
• The barrel finish is Matte Blued.
• The magazine capacity varies by configuration (see notes).
• The choke system is Accu-Choke with a Cylinder Bore choke installed.
• The stock material and finish are black synthetic.
• The receiver is Optic-Ready and ships with a cover plate installed.
• The sights are bead front with a fixed rear.
• The safety type is a tang safety.
• The unloaded weight is listed as 7.25 lbs.
• The product UPC is 015813516044.

Engineered for users who value straightforward reliability, the 590S provides adaptable ammunition handling and optic-ready convenience in a service-oriented package. The controls and stock geometry make it suitable for repetitive training sessions and security applications where consistent cycling and modular sighting options matter. Its synthetic furniture and matte finish reduce reflective surfaces while easing routine maintenance.

Owners commonly praise the 590S for its flexible shell-cycling capability and the convenience of an optic-ready receiver that accepts low-profile micro-dot sights for faster sight acquisition.

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