Winchester SX4 Extreme Defender | 12ga | 18.5in | 511321395

The Winchester SX4 Extreme Defender is a semi-automatic 12 Gauge autoloader designed for reliable cycling across a wide range of loads. It features an 18.5-inch barrel, a synthetic woodland-camo pistol-grip stock and a Flat Dark Earth (FDE) receiver finish. The shotgun is equipped with a Picatinny optics rail and includes three Invector-Plus choke tubes for patterning versatility.

Common real-world applications include 3-gun competition and turkey hunting, where fast follow-up shots and adjustable chokes are useful tools.

Product Specifications

• This shotgun is chambered for 12 Gauge.
• The action is a semi-automatic autoloader.
• The barrel measures 18.5 inches in length.
• The overall length is 39.5 inches.
• The unloaded weight is approximately 7.12 lbs.
• The magazine capacity is 4 rounds (2.75″ shells).
• The chamber accepts 3″ shells.
• The stock is made of synthetic material with a woodland camouflage finish.
• The receiver is FDE aluminum alloy and includes a Picatinny optics rail.
• The metalwork features a Flat Dark Earth (FDE) Cerakote finish with a chrome-plated chamber and bore.
• Includes the Invector-Plus choke system with three tubes: Full, Modified, and Improved Cylinder.
• Sighting is provided by an LPA front sight and a ghost-ring rear sight.
• The safety is a reversible crossbolt design.
• The shotgun features a self-adjusting Active Valve gas system and a back-bored barrel.
• UPC is 048702026478.

The SX4 Extreme Defender combines an ergonomic pistol-grip platform with the reliability of Winchester’s Active Valve gas system and interchangeable Invector-Plus chokes. Its compact 18.5-inch barrel and Picatinny rail make it a flexible option for shooters who want a robust semi-automatic shotgun with modern features and a woodland camo finish.

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