The Winchester SX4 Field Compact is a semi-automatic shotgun chambered in 20 gauge with a 26-inch barrel and 3+1 capacity. Overall length is 45 inches. Weight is 6 lbs 2 oz. The stock is walnut. The chamber is 3 inches. Sights are a fiber optic front and mid-bead. The recoil system uses Winchester's Inflex technology. Chokes are Invector Plus Flush. 
 

Key Specifications 

• Gauge: 20 GA 
• Barrel Length: 26 inches 
• Overall Length: 45 inches 
• Weight: 6 lbs 2 oz 
• Capacity: 3+1 rounds 
• Finish: Walnut 
• Chamber: 3 inches 
• Sights: Fiber Optic Front / Mid-Bead 
• Choke: Invector Plus Flush 
   

Features 

At 6 lbs 2 oz with a walnut stock, the SX4 Field Compact is genuinely light for a semi-auto shotgun. The walnut finish is traditional and handles normal field use without the fragility concerns of synthetic stocks at this price point. 
 
The fiber optic front sight picks up quickly in variable light, which matters in early morning or late afternoon hunting conditions. The Inflex recoil system reduces felt recoil by directing the pad down and back rather than straight into the shoulder. The 20 gauge's already mild recoil becomes even more comfortable as a result. 
 
The Invector Plus choke system is the standard Winchester/Browning flush-mount platform, so replacement or aftermarket chokes are readily available.

The Winchester SX4 Field Compact in 20 gauge walnut earns consistent positive reviews, particularly from hunters looking for a light, well-balanced field gun.

The weight and balance are the most-praised attributes. At just over 6 lbs with a walnut stock, it carries comfortably all day and swings naturally on flushing birds. The 20 gauge's manageable recoil, combined with the Inflex pad, makes for a comfortable shooting experience even over extended sessions.

The walnut stock gets good marks for appearance and feel. Reliability through a range of 20 gauge loads is reported as solid. The fiber optic sight is practical for fast target acquisition.

The minor criticisms center on fit for larger-framed shooters, who occasionally find the compact dimensions less comfortable over extended sessions. Some ammunition types cycle less reliably than others, which a few users note is worth testing before field use.