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The SX4 Upland Field is Winchester's answer to the question every upland hunter eventually asks: can a semi-auto be both reliable and genuinely good-looking? The walnut version answers with a satin-finished Grade II/III Turkish walnut stock and fore-end, a matte nickel aluminum receiver dressed with scroll engraving, and a matte-blued 28-inch barrel. The two-tone finish is a throwback to classic field guns without feeling dated. Under the hood is Winchester's proven Active Valve gas system, a self-adjusting design that meters the exact amount of gas pressure needed to run a wide spectrum of loads — from budget target loads to full-power 3-inch hunting shells — cleanly and reliably. Quadra-Vent ports in the fore-end vent excess gas upward and forward, which helps keep the action cleaner and reduces felt bolt velocity with heavier loads.
One of the first things people notice when they pick up this gun is how naturally it comes to the shoulder. Winchester redesigned the grip profile on the SX4, making it noticeably slimmer than the SX3, which translates directly into better pointability when a rooster or quail erupts without warning. The fore-end is also contoured for a more secure, natural hold, and both feature cut checkering panels so things stay put in wet grass or damp early-morning covers. The enlarged bolt handle, bolt release, and crossbolt safety are sized to work with gloves, which is a genuinely useful upgrade for anyone who hunts cold-weather pheasant or mixed upland-waterfowl days. The reversible safety handles left- or right-handed operation without any tools.
The Inflex Technology recoil pad does something most pads don't — it actively redirects the recoil impulse down and away from your cheek rather than straight back into it. Combined with the gas system's inherent recoil-softening action, the SX4 is noticeably easier on the shoulder than a lot of comparable 12-gauges, which matters when you're covering big Dakota fields or putting in a long day on a multi-species mixed bag hunt. The 28-inch barrel is back-bored to 0.742 inches and hard chrome-lined through the chamber and bore, pairing with the Invector-Plus flush choke system to produce dense, consistent patterns. Three chokes are included — Full, Modified, and Improved Cylinder — covering the range of upland scenarios from close-flushing quail to longer crossing pheasant shots. The TruGlo fiber optic front sight picks up quickly in low light and makes target acquisition fast at any hour of the day.
Length-of-pull spacers are included to dial in fit, and the drop-out trigger group makes cleaning straightforward after a muddy day in the field.
The Active Valve gas system is self-adjusting, so it meters gas pressure automatically based on the load being fired. In practice, this means the SX4 runs reliably from lighter 2-3/4 inch field loads up through full-power 3-inch hunting shells. The chamber on this model is 3 inches, so 3-1/2 inch magnum shells are not compatible with this specific configuration.
It's a solid choice. At just over 7 pounds with a 28-inch barrel, it's not the lightest gun on the block, but the weight is well-distributed and it carries comfortably over many miles of cover. The Inflex Technology recoil pad and gas operating system work together to keep the gun noticeably soft-shooting, so your shoulder holds up better over a full day compared to heavier-recoiling alternatives.
Yes. The crossbolt safety is fully reversible and can be switched to the left side for southpaw shooters without any tools. The enlarged bolt handle and bolt release are accessible from both sides as well, making the gun quite usable for left-handers even though the ejection port is right-side only.
That depends on your terrain and target species. Improved Cylinder is a great starting point for close-flushing birds like quail or ruffed grouse in thick cover. Modified works well for most pheasant hunting where flushes happen at moderate distance. Full is there if you want tighter patterns for longer crossing shots, though it's less commonly needed in typical upland scenarios. The Invector-Plus system also accepts a wide range of aftermarket chokes if you want to dial things in further.
The SX4 builds on the same proven Active Valve gas system foundation as the SX3, but with a number of practical refinements. The grip is slimmer for better pointability, the bolt handle, bolt release, and safety are all larger and glove-friendly, the trigger guard is more spacious, and the Inflex recoil pad has a bigger footprint for better recoil management. The SX4 is also slightly lighter than the SX3 with the same barrel length, which adds up over a long day in the field.
Winchester includes length-of-pull spacers in the box, which fit between the stock and recoil pad to add length if the standard 14-1/4 inch pull feels too short. It's worth noting that unlike the older SX3, the SX4 does not include drop and cast shim adjustments, so if you need significant cast adjustment, you may want to factor that into your decision.
| UPC | 048702016998 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 511236392 |
| Action | |
| ATF Type | Shotgun |
| Barrel Finish | Matte Blued |
| Barrel Length | 28" |
| Caliber/Gauge | 12 Gauge |
| Capacity | 4 + 1 |
| Chokes Included | Full/Improved Cylinder/Modified |
| Color | BI-TONE |
| Length | 37.3500 |
| Package Height | 3.1 |
| Package Width | 9.2 |
| Product Type | Shotgun |
| Safety | Reversible Button |
| Shipping Weight | 9.15 |
| Sights | TruGlo Fiber Optic |
| Sights Type | Fixed Sights |
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