The Winchester SX4 is a left-hand semi-automatic 12-gauge shotgun with a 26-inch barrel and matte black composite stock. The 3.5-inch chamber handles the full range of 12-gauge loads, and the left-hand orientation covers controls and ejection for southpaw shooters. 
 

Key Specifications 

• Model Name: SX4 
• Brand: Winchester 
• Caliber: 12 GA 
• Barrel Length: 26 inches 
• Overall Length: 49 inches 
• Weight: 7.20 lbs 
• Capacity: 4+1 rounds (2-3/4" shells) 
• Chamber Length: 3.5 inches 
• Action Type: Semi-Auto 
• Sights: TruGlo Fiber Optic Front Sight 
• Grip Type: Standard 
• Safety Feature: Crossbolt Safety 
• Finish: Matte Black Composite Stock 
   

Features 

The Invector Plus choke system takes interchangeable chokes for different pattern densities. TruGlo fiber optic front sights help in varied lighting. Inflex technology in the recoil pad reduces felt recoil, which matters more with the heavier 3.5-inch magnum loads the chamber accepts. The aluminum alloy receiver is chrome-plated in the chamber and bore for durability and easier cleaning. The crossbolt safety sits in a left-hand-friendly position. 
 

Usage 

The 26-inch barrel and 3.5-inch chamber make this a capable waterfowl and upland gun that handles full-magnum steel shot loads without modification. The left-hand configuration is the primary reason to choose this model over standard SX4 variants.

Left-handed shooters are the main audience for this SX4 variant, and owner feedback reflects that. Reliability and the left-hand controls get consistent praise - having proper southpaw ergonomics rather than an adapted right-hand design is valued, and most owners report it cycles everything from light field loads to 3.5-inch magnums without issues. The Inflex recoil pad and the SX4's gas system make magnum loads tolerable for extended sessions.

Weight at 7.20 lbs comes up as a point of discussion; some find it appropriate for a 3.5-inch 12-gauge and others would prefer lighter. The break-in period is mentioned by a few owners - some report it needed 50-100 rounds before cycling lighter loads consistently. Price is acknowledged as a consideration, though most left-hand buyers find the market for dedicated LH semi-autos narrow enough that the Winchester commands reasonable value. Aftermarket customization options are noted as limited compared to more popular right-hand semi-autos.