The Winchester SX4 Extreme Defender 12 gauge is a semi-automatic shotgun with an 18.5-inch barrel, a synthetic pistol grip stock in Woodland camouflage and an FDE Cerakote finish (Winchester part no. 511321395). Winchester runs it on the Active Valve gas system and fits an LPA front sight and rear ghost ring sight on a Picatinny rail. Three Invector-Plus choke tubes ship with the gun. It weighs 6 pounds 14 ounces and measures 39.5 inches long.

Key Specifications

• The gauge is 12 gauge, the most versatile shotgun size for sport and defense.
• The chamber is 3 inches, so the gun handles both 2-3/4 inch and 3 inch shells.
• The barrel is 18.5 inches with a flat dark earth Cerakote finish, short enough to maneuver in the brush.
• Capacity is 4 shells of 2-3/4 inch ammunition in a tubular magazine.
• The action is semi-automatic with the Active Valve gas system, built for reliable cycling across a wide range of loads.
• Chokes are Invector-Plus Flush tubes in Full, Modified and Improved Cylinder, included with the shotgun.
• Sights are an LPA front sight and rear ghost ring sight on a Picatinny rail, which gives a quick, aligned sight picture.
• The stock is a synthetic pistol grip stock in Woodland camouflage with textured grip panels.
• The receiver is aluminum alloy with an FDE Cerakote finish, lightweight and corrosion resistant.
• The safety is a reversible crossbolt safety, which can be set up for either hand.

Frequently Asked Questions

Which chokes come with it? Winchester includes three Invector-Plus Flush choke tubes: Full, Modified and Improved Cylinder, along with a flat choke wrench.

Can it shoot 3-inch shells? Yes. The chamber is 3 inches, and Winchester lists the magazine capacity as four 2-3/4 inch shells.

Does it have a rail for an optic? Yes. The LPA sights are mounted on a Picatinny rail.

Buy the Winchester SX4 Extreme Defender 12 Gauge Shotgun, 18.5-Inch, Woodland FDE, 4-Round

The Extreme Defender covers hunting, 3-gun and home defense in one maneuverable package. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more semi-auto shotguns while you are here.