The Winchester SX4 Defender is a 12-gauge semi-automatic shotgun with an 18.5-inch barrel and a flat dark earth synthetic stock. Its Active Valve gas system, interchangeable Invector-Plus choke system, and practical sighting features suit field and sporting applications. The design includes a Picatinny optics rail, LPA front sight, and ghost-ring rear sight.

Key Specifications

• The shotgun uses a 12-gauge chambering.
• The semi-automatic action uses an Active Valve gas system.
• The barrel measures 18.5 inches for a compact overall profile.
• The maximum chamber size is 3 inches.
• The stock is made from synthetic material and finished in flat dark earth.
• The metalwork features a flat dark earth Cerakote finish.
• The sighting system includes an LPA front sight and ghost-ring rear sight.
• A Picatinny rail provides an attachment point for compatible optics.
• The shotgun uses the Invector-Plus flush choke system.
• The package includes full, modified, and improved-cylinder choke tubes.

With its compact barrel, durable synthetic furniture, adaptable choke system, and versatile sight and rail configuration, the SX4 Defender is a practical choice for sporting, field, and outdoor use. Its ergonomic controls and gas-operated action provide a capable platform for shooters seeking a straightforward semi-automatic shotgun.

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