The Winchester SX4 Field is a semi-automatic 20-gauge shotgun with a 28-inch barrel, Turkish walnut stock, and matte black receiver. It has a 3-inch chamber, 3-round capacity (up to 4), weighs 6.5 lbs, and runs 49 inches overall. 
 

Key Specifications 

• Model: SX4 Field 
• Manufacturer: Winchester 
• Caliber/Gauge: 20 GA 
• Barrel Length: 28 inches 
• Capacity: 3 rounds (with a standard capacity of up to 4 rounds) 
• Weight: 6.5 lbs (104 oz) 
• Overall Length: 49 inches 
• Finish: Walnut (Matte Black Receiver) 
• Action Type: Semi-Automatic 
• Chamber Size: 3 inches 
   

Detailed Features 

 
The fiber optic front sight picks up fast in varying light. The Invector-Plus choke system takes interchangeable chokes, so pattern width can be adjusted for different game or competition distances. The Inflex recoil pad reduces felt recoil at the stock, which makes a difference during high-volume days in the field. The Turkish walnut stock and forend are fitted to an aluminum alloy receiver, keeping total weight at 6.5 lbs. 
 

Usage 

 
The SX4 Field handles upland bird hunting, waterfowl, and clay target sports. The 20-gauge chambering is lighter recoiling than 12-gauge, which suits younger shooters or anyone who puts a lot of rounds through a shotgun in a day. The Invector-Plus choke compatibility is wide, and aftermarket choke options are plentiful.

Owners of the Winchester SX4 Field 20GA walnut model are mostly positive and focus on specific performance characteristics.

Lightweight and low recoil are the most common positives. At 6.5 lbs the shotgun carries well over long hunts, and the 20-gauge chambering combined with the Inflex pad keeps felt recoil manageable for all-day use.

The semi-auto action gets good marks for reliability. Most owners report consistent cycling across multiple shell types, and the action feels smooth in operation.

The walnut finish draws favorable comments for appearance. Owners appreciate the classic look compared to synthetic-stocked alternatives at similar price points, and the build quality is described as solid.

The main operational criticism involves occasional cycling issues with specific ammunition. Light target loads sometimes fail to cycle the action reliably, which a few owners have noted. Using standard or heavier field loads typically eliminates this.

Some owners discuss choke preferences and note interest in aftermarket options to tune patterns for specific applications. A few mention they added different chokes from the factory setup.