The TriStar Cobra III Marine is a 12-gauge semi-automatic shotgun with an 18.5-inch barrel, 3-inch chamber, and 5+1 capacity. It weighs 6.2 lbs. The Marinecote finish resists corrosion well, making it a practical choice for humid or wet environments. The chrome-lined barrel and chamber extend service life and simplify cleaning. Blade front sights and a vent rib provide a usable sighting plane for close-range work. 
 

Key Specifications 

• Model: Cobra III Marine 
• Gauge: 12 GA 
• Action: Semi-Automatic 
• Capacity: 5+1 
• Barrel Length: 18.5 inches 
• Weight: 6.2 lbs 
• Chamber: 3 inches 
• Finish: Marinecote

The TriStar Cobra III Marine gets credit for its Marinecote finish, lightweight build, and smooth operation with a range of standard ammunition. Most owners use it for home defense and recreational shooting and report consistent results. Recoil can be on the sharper side for extended range sessions, which a few owners flag as a drawback. There are occasional reports of cycling inconsistencies with certain shell types. The overall consensus frames it as a budget-friendly shotgun that handles its core duties well, with the caveat that ammunition selection can matter more than it does with higher-end guns.