"The Stoeger M3020 Semi-Auto Shotgun uses the reliable Inertia Driven action to cycle either 2-3/4"" or 3"" 20-gauge shotgun shells without adjustment. A ventilated, stepped rib and fiber-optic front sight allow for quick target acquisition, even in low light. Standard features include a shim kit to provide shooters with optimum fit and 3 screw-in choke tubes and wrench. Choke tubes included: IC, XFT, and M. Sling swivel studs on the stock and forend cap offer an attachment point for a carry sling. The Stoeger M3020 is an ideal semi-automatic shotgun for a wide range of applications, from extreme-weather duck hunting, to spring turkey hunting, to shooting pheasants over corn stubble. 20-gauge semi-auto shotgun Reliable Inertia Driven action Cycles 2-3/4"" or 3"" shotgun shells Synthetic stock and forend Stepped rib and fiber-optic front sight"