Winchester SX4 Defender 12 Gauge 18.5 in Shotgun

The Winchester SX4 Defender is a 12-gauge semi-automatic shotgun designed for versatile use on the range and in the field. It features an 18.5-inch barrel, 3-inch chamber, Woodland camouflage synthetic stock, and Flat Dark Earth finish. The Active Valve gas system, fixed sights, Picatinny rail, and Invector-Plus choke system provide a practical configuration for varied shooting applications.

The shotgun includes a fixed pistol-grip stock, LPA front sight, ghost-ring rear sight, reversible crossbolt safety, and drop-out trigger group. Its back-bored design and self-adjusting Active Valve system support consistent operation across a range of suitable loads. Three Invector-Plus flush choke tubes are included: Full, Improved Cylinder, and Modified.

Key Specifications

• The gauge is 12 Gauge for compatible 12-gauge shotshells.
• The action is semi-automatic.
• The barrel measures 18.5 inches in length.
• The chamber accepts shells up to 3 inches.
• The listed capacity is 4 shells when using 2.75-inch shells.
• The shotgun has an overall length of 39.50 inches.
• The sight setup includes an LPA front sight and ghost-ring rear sight.
• The choke system is Invector-Plus flush and includes Full, Improved Cylinder, and Modified tubes.
• The receiver includes a Picatinny rail.
• The stock is synthetic with a Woodland camouflage finish.

With its compact dimensions, adaptable choke system, practical sight arrangement, and optics-ready rail, the SX4 Defender offers a well-equipped platform for shooters who value straightforward controls and flexible configuration. The Woodland camouflage stock and Flat Dark Earth finish complete a distinctive, field-oriented setup.

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