The TriStar Cobra III Marine is a 12 Gauge pump-action shotgun with an 18.50-inch chrome-lined barrel and a spring-assisted forearm. It is configured for marine and defensive applications where corrosion resistance and reliable cycling are priorities. The design suits home defense, tactical training, and general-purpose range work, combining a compact barrel length with a 5+1 capacity and MobilChoke CT-1 compatibility.

Key Specifications

• This model is chambered in 12 Gauge for standard 12ga loads.
• The barrel measures 18.50 inches and features a chrome-lined chamber and bore.
• The shotgun carries a capacity of 5+1 rounds in standard configuration.
• The chamber accepts 3-inch shells to support a wide range of 12ga loads.
• The action is a Pump Action, and the Marine model includes a spring-loaded forearm for assisted return.
• It uses the MobilChoke system and ships with a CT-1 choke; a choke box and wrench are included.
• The firearm weighs approximately 6.20 lbs for a balance of handling and control.
• Equipped with a black synthetic stock featuring a rubber recoil pad and swivel studs for sling attachment.
• There is an under-forearm Picatinny rail for mounting lights or accessories.

The Cobra III Marine’s corrosion-resistant finishes, assisted pump feature, and MobilChoke compatibility make it a practical choice for boat crews, homeowners, and instructors who require a reliable 12ga platform. Its 18.50-inch barrel balances maneuverability and patterning for defensive and utility roles. Built with synthetic furniture and stainless components, it is designed to tolerate wet environments while remaining straightforward to maintain.