CITADEL Mariner | 12 Gauge | 18.5 in | FRMN1220SYN

The Citadel Mariner FRMN1220SYN is a 12 gauge pump-action shotgun built for routine field and recreational use. It pairs a full-length heat-shield barrel and Picatinny-equipped receiver with a fixed black synthetic tactical stock for a corrosion-resistant package. The firearm ships with three choke tubes and a side shell holder to support a range of ammunition patterns. Configurations like this are commonly used for sporting clays and upland or waterfowl hunting scenarios.

Product Specifications

• The gauge is presented as 12 Gauge.
• The action type is Pump Action.
• The barrel measures 18.5 inches and features a full-length heat shield.
• The overall length is listed as 39 inches.
• The ammunition capacity is 4+1.
• The maximum chamber size accepts 3 inches.
• The stock is made from black synthetic material and is fixed in style.
• The finish on metal parts is specified as nickel.
• The receiver includes a Picatinny rail for optics or accessories.
• The sighting system is a blade front with an adjustable rear sight.
• The package includes 3 choke tubes (multiple constrictions).
• A side shell holder is fitted to the receiver/stock area.
• The stock features a recoil pad for added comfort.
• Barrel description is listed as a full heat shield.
• The UPC is 682146897944.

The Mariner provides a practical, corrosion-resistant layout that emphasizes simple, repeatable operation and accessory flexibility. Its full-length heat shield and Picatinny rail make it suitable for extended days in the field or patterning different choke and sight setups on the range. With three included choke tubes and a side shell holder, the configuration is ready for a range of shooting applications out of the box.

Many users praise the Mariner for its durable construction and reliable function; others note the practical feature set—full heat shield, included choke set and Picatinny rail—as particularly useful additions.

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