Mossberg 590S | 12 Gauge | 20″ | 51602

The Mossberg 590S is a purpose-built pump-action 12 gauge shotgun designed for flexibility and rugged service use. It accepts 1.75″, 2.75″ and 3″ shells through a 3″ chamber and features a 20″ steel barrel with a cylinder-bore choke installed. The forend is M-LOK compatible for attaching accessories, and the sighting system uses ghost-ring rear and front elements for rapid sight acquisition. This configuration suits duty/range training and competitive or practical shotgun applications where reliability and modularity are priorities.

Product Specifications

• The manufacturer is Mossberg.
• The model is 590S.
• The manufacturer’s part number is 51602.
• The gauge is 12 gauge.
• The barrel measures 20 inches.
• The maximum chamber size is 3 inches, compatible with 1.75″, 2.75″ and 3″ shells.
• The included choke is a cylinder bore tube.
• The forend is M-LOK compatible for accessory mounting.
• The sights are configured with ghost ring rear and front elements.
• The stock material is a black synthetic.
• The receiver is engraved.
• The metal finish is matte blued with a black stock.
• The barrel material is steel.
• The safety is a tang-mounted safety.
• The UPC is 015813516020.

Built to be functional and adaptable, the 590S pairs straightforward pump-action mechanics with an accessory-ready forend and user-focused controls. Its short-barrel configuration and shell-length cycling capability make it a practical choice for duty-style training and action-oriented shotgun sports where reliability and simple maintenance matter.

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