The Winchester SX4 Defender is a 12-gauge semi-automatic shotgun designed for versatile field and defensive use. With an 18.5-inch barrel and a 3-inch chamber it balances maneuverability with compatibility across common 12-gauge loads. The Flat Dark Earth Cerakote finish on the receiver and a synthetic field-style stock provide durable, weather-resistant handling. This configuration is suited to home defense, range work, and field applications where reliable cycling and quick handling matter.

Key Specifications

• The shotgun is chambered for 12 Gauge.
• It operates with a semi-automatic action using Winchester’s Active Valve gas system.
• The barrel measures 18.5 inches for compact handling.
• The chamber accepts a maximum shell length of 3 inches.
• The magazine capacity is 4 rounds.
• The package includes three Invector-Plus choke tubes: F, M, IC.
• The finish is Flat Dark Earth Cerakote on an aluminum-alloy receiver for corrosion resistance.
• It is fitted with an LPA front sight and a ghost-ring rear sight, and it includes a Picatinny rail for optics.
• The overall length is 39.5 inches and the synthetic field-style stock includes a recoil pad and sling swivel studs.

The SX4 Defender pairs proven gas-operation technology with practical field-oriented features to deliver dependable cycling and straightforward ergonomics for informed users. Its compact barrel and robust feature set make it suitable for close-quarters handling and general-purpose field use. Included choke options and chrome-plated chamber and bore contribute to consistent maintenance and patterning across a range of loads.