Description
The Winchester SX4 20 Gauge 26″ Matte Black Synthetic is a field-ready semi-auto that sheds weight without shedding reliability. Built on the proven Active Valve gas system, this 20-gauge cycles everything from 2¾-inch target loads to 3-inch magnums. The 26-inch barrel with TruGlo fiber-optic front sight gets on target fast, and the matte black synthetic stock stands up to rain, mud, and brush. At $967.64, it’s a solid mid-range workhorse for upland birds, waterfowl, and clays.
| Manufacturer | Winchester Repeating Arms |
|---|---|
| Model | SX4 20 Gauge 26″ Matte Black Synthetic |
| Material | Synthetic stock, aluminum receiver |
| Compatibility | 20 gauge, 2¾″ and 3″ shells |
| Finish | Matte black (barrel, receiver, stock) |
| Weight | Approximately 6 lbs 8 oz (per manufacturer specs) |
| Condition | New |
Key Features
- Active Valve Gas System – Why it matters: Self-regulating gas pressure lets the SX4 cycle light target loads and heavy magnums without adjustment, so you don’t have to fiddle with gas settings in the field.
- TruGlo Fiber-Optic Front Sight – Why it matters: The bright green fiber-optic rod gathers ambient light for fast, precise sight acquisition in low-light dawn or dusk hunts.
- Inflex Recoil Pad – Why it matters: This soft, directional pad reduces felt recoil by up to 54% compared to standard pads, keeping you comfortable through a long day of shooting.
- Larger Controls & Ergonomics – Why it matters: The bolt handle, bolt release, and safety are oversized for easy operation with gloved hands—critical in cold or wet conditions.
- Invector-Plus Internal Choke System – Why it matters: Accepts the full range of Winchoke/Invector-Plus tubes, letting you tailor patterns for close-cover quail or long-range ducks.
Who It’s For
The SX4 20 gauge is built for the hunter who wants a lightweight, fast-handling shotgun for all-day carry. It suits upland bird hunters chasing pheasant, grouse, or quail, as well as waterfowlers who need reliable cycling in marsh mud. The 26-inch barrel and synthetic stock make it a natural pick for new shooters stepping up from 12 gauge, or for anyone who values simplicity and weather resistance over fancy wood.
Pros & Cons
- Pro: Cycles reliably from 2¾″ target loads to 3″ magnums—no gas tuning needed.
- Pro: Light weight (approx. 6.5 lbs) reduces fatigue on long walks.
- Pro: Oversized controls work well with gloves.
- Con: The synthetic stock can feel slick when wet; some shooters add grip tape for a more secure hold.
Comparison: Winchester SX4 vs. Competitors
| Feature | Winchester SX4 20 Gauge | Benelli Montefeltro 20 Gauge | Remington 1100 20 Gauge |
|---|---|---|---|
| Price | $967.64 | ~$1,200 | ~$850 |
| Weight | 6.5 lbs | 5.8 lbs | 7.2 lbs |
| Gas System | Active Valve (self-cleaning) | Inertia (less cleaning) | Pressure-compensating (tuned for 2¾″) |
| Stock Material | Synthetic | Synthetic or wood | Synthetic |
| Choke System | Invector-Plus | Crio | Rem Choke |
| Best Use | All-around field hunting | Lightweight upland | Target/hunting mix |
FAQ
Can the Winchester SX4 20 gauge cycle light target loads reliably?
Yes. The Active Valve gas system self-regulates to handle 1-ounce target loads (2¾″) without short-stroking, as long as the gun is clean and properly lubricated.
What chokes come with the SX4 20 gauge 26″ barrel?
The SX4 typically ships with three Invector-Plus chokes: Full, Modified, and Improved Cylinder. Always confirm with your retailer, as packaging may vary.
Is the Winchester SX4 compatible with aftermarket recoil pads?
The factory Inflex pad is proprietary, but aftermarket options from companies like Kick-eez or Pachmayr can be fitted with minor modification to the stock.
How does the SX4 20 gauge compare to the 12 gauge model?
The 20 gauge weighs about 1 pound less than the 12 gauge version and has a slightly smaller receiver, making it handier for upland hunting. Both use the same Active Valve system and oversized controls.
According to Winchester specs, the SX4 20 gauge’s receiver is machined from aluminum to keep weight down without sacrificing strength. A 2023 survey of 500 upland hunters showed that 68% preferred 20-gauge shotguns for walk-up hunting over heavier 12-gauge alternatives.
✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout
Browse more semi-auto shotguns in our Semi Auto Shotguns category, or check out our 20 Gauge Shotguns and Winchester Shotguns collections.
Last updated: April 2026
Reviews
There are no reviews yet.