Citadel(R) Mariner FRMN2020NKL is a full-size pump-action shotgun chambered in 20 Gauge with a 3 in chamber 18.50 in nickel finished heat shield barrel nickel finished aluminum receiver with Picatinny rail and black fixed walnut stock. It is configured as a defensive and utility shotgun with corrosion-resistant nickel finish accessory-ready receiver rail heat shield barrel setup and 4-round magazine capacity.Key Features Chambered in 20 Gauge 3 in chamber 18.50 in nickel finished heat shield barrel Pump-action operating system 4+1 firearm capacity Nickel finished aluminum receiver with Picatinny rail Black fixed walnut stock Mariner defensive shotgun configurationCitadel(R) offers firearms with a focus on practical function durable construction and accessible sporting and defensive configurations. The brand is known for shotguns pistols and rifles built for range use home defense and general shooting applications. Citadel firearms are designed to provide dependable handling and straightforward operation across common field and defensive use conditions.