Winchester SX4 20 Gauge 28 in Synthetic Semi-Auto

The Winchester SX4 is a semi-automatic 20 gauge shotgun built for reliable field performance. It pairs a 28-inch vent-rib, back-bored barrel with Winchester’s Active Valve gas system to cycle a wide range of loads while reducing felt recoil. The matte black synthetic stock features textured grip panels and Inflex Technology recoil pad for improved comfort and control. The gun includes Invector-Plus choke tubes and a TruGlo fiber optic front sight for clear target acquisition.

Key Specifications

• The action is Semi-Auto.
• The chamber size is 3″.
• The barrel measures 28 inches with a vent rib and back-bored profile.
• The gauge is 20 Gauge.
• The stock is Black synthetic with textured grip panels.
• Includes F, M, IC Invector-Plus choke tubes.
• Sights feature a TruGlo fiber optic front.
• The receiver is Aluminum alloy with a matte black finish.
• The overall length is 49 inches.
• Features an Inflex Technology recoil pad and an ambidextrous safety.

Designed for everyday hunting and field use, the SX4 balances dependable autoloading with practical ergonomics and recoil mitigation. Its combination of a back-bored barrel, Active Valve gas system and user-focused controls makes it a straightforward choice for shooters who want consistent cycling and a comfortable carry in varied conditions.

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