The Winchester SX4 Upland Field is a semi-automatic shotgun chambered in 20 GA with a 26-inch barrel, Grade II/III Turkish walnut stock, and blued metal. It weighs 6 lbs 12 oz and holds 3 rounds in the magazine plus one in the chamber. 
 

Key Specifications 

• Model: SX4 Upland Field 
• Caliber: 20 GA 
• Action: Semi-Automatic 
• Barrel Length: 26 inches 
• Capacity: 3 rounds (4 total with chamber) 
• Weight: 6 lbs 12 oz 
• Finish: Walnut stock with blued metal parts 
   

Detailed Features 

The Invector Plus choke system accepts interchangeable chokes for different patterns and ranges. TruGlo fiber optic sights give a clear sight picture in low light. The Inflex Technology recoil pad absorbs a noticeable amount of felt recoil, which matters over a long day of shooting. The walnut is Grade II/III, so the figure varies by individual gun but the wood is genuine and not laminate. At under 7 lbs the gun carries well in the field without feeling flimsy.

Owners of the SX4 Upland 20GA come back to a few consistent points. The walnut stock gets attention first — the wood finish looks good and feels solid, and the fit and finish on Winchester's walnut versions tends to hold up better than entry-level alternatives. In the field the gun cycles reliably across a range of loads and handles typical upland bird hunting without cycling issues.

Weight and handling are frequent positives. Hunters who walk a lot appreciate that it stays under 7 lbs and balances well. The Inflex recoil pad draws specific mention from shooters who are sensitive to recoil or are newer to shotgunning.

Customization gets occasional discussion — choke swaps and aftermarket sights are straightforward on this platform. Compared to other semi-autos in the segment, most owners rate it competitive on value. The occasional comparison to Beretta or Browning alternatives shows up, usually acknowledging those brands carry more cachet but that the SX4 keeps up on function for less money.