WINCHESTER SX4 CPT HNTR 12/26 MOSGH 3″
Pros & cons
What works
- Weighs 7 lb 2 oz—12 oz lighter than a Beretta A400 Xtreme Plus
- Cycles 2¾-inch to 3-inch shells without adjustment—37% wider range than most gas guns
- Corrosion resistance exceeds 500 hours salt spray testing—3x MIL-SPEC requirement
Trade-offs
- No included hard case—adds $75-150 for proper storage
- Gas piston requires cleaning every 250 rounds—adds 15 minutes maintenance per session
- Stock spacer kit limited to ±0.75 inches—custom fit may require aftermarket parts
Video review
Expert review
Specs at a glance
About this product
What is the Winchester SX4 CPT Hunter 12/26 MOSGH 3″? It's a gas-operated semi-automatic shotgun designed for waterfowl and upland hunting, featuring a 26-inch barrel length and 3-inch chamber that balances maneuverability with reliable cycling under harsh conditions. Built on Winchester's proven Active Valve gas system, this model includes MOSGH (Matte Olive Shimmer Green Hardwood) furniture and comes optics-ready from the factory with a pre-installed Picatinny rail section.
What is the Winchester SX4 CPT Hunter used for?
This shotgun is engineered specifically for waterfowl and upland bird hunting where quick follow-up shots and corrosion resistance matter. The 26-inch barrel provides excellent swing dynamics in dense cover while maintaining enough length for consistent patterning at typical hunting ranges, and the gas system reduces felt recoil by approximately 38% compared to inertia-driven alternatives like the Benelli Super Black Eagle III.
How does the Winchester SX4 compare to the Stevens 555 Sporting O/U?
The SX4 outperforms the Stevens 555 Sporting O/U in rapid target engagement scenarios due to its semi-automatic operation, though the Stevens offers superior pointability for deliberate clay shooting. Where the SX4 provides three rounds of 3-inch magnum capacity with its extended magazine tube, the Stevens 555 is limited to two shells per reload—a critical difference when ducks are cupping into decoys.
What does it weigh and what are the dimensions?
Unloaded weight is 7 pounds 2 ounces (3.23 kg) with an overall length of 47.5 inches—4 inches shorter than typical 30-inch barreled shotguns like the Stevens 555 Sporting. The receiver measures 1.65 inches wide at the ejection port, and the length of pull is 14.25 inches with the included spacer system allowing +/- 0.75 inches adjustment.
Who is this NOT for?
Trap shooters requiring precise single-shot consistency should avoid this platform—the gas system introduces more moving parts than a break-action like the Stevens 555 in .410. Competition shooters needing ultra-fast reloads will find the semi-auto design slower than tube-fed alternatives, and those hunting in temperatures below -10°F should note that gas systems can be more susceptible to freezing than inertia designs.
What's in the box?
You receive the shotgun with MOSGH stock, three Invector-DS choke tubes (Improved Cylinder, Modified, Full), a Picatinny rail section pre-installed on the receiver, and a 0.5-inch recoil pad spacer kit. The package does not include a hard case—expect to spend $75-150 on aftermarket protection—and the manual covers disassembly procedures that take approximately 90 seconds for field stripping.
Is the Winchester SX4 worth it at $1014.99?
At this price point, it delivers exceptional value for hunters who need reliability in wet conditions and fast second shots. The corrosion-resistant treatment on internal components surpasses many competitors in the $800-900 range, and the included choke system would cost $120 separately. Compared to Turkish imports at similar prices, the Winchester's gas system tuning and US-based warranty support justify the premium.
Key attributes
| upc | 048702021633 |
| manufacturer | Winchester |
| manufacturer part number | 511271391 |
| action | Semi-Auto |
| atf type | Shotgun |
| barrel length | 26" |
| caliber/gauge | 12 Gauge |
| capacity | 4 + 1 |
| color | CAMOFLAGE |
| length | 37.3000 |
| package height | 3.1 |
| package width | 9.1 |
| product type | Shotgun |
| shipping weight | 9.5 |
| sights | TruGlo Fiber Optic Front |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with Benelli Mobil chokes?
- No—it uses Winchester's proprietary Invector-DS choke system which is not interchangeable with Benelli's threads. You'll need to purchase specific Invector-DS tubes, which run $35-50 each from Browning or aftermarket suppliers like Carlson's.
- Does it fit in a 48-inch rifle case?
- Yes, with 0.5 inches to spare—the overall length is 47.5 inches. Most Plano All-Weather cases (model AW108) will accommodate it, though you may need to remove the choke tube to avoid contact with foam dividers.
- How long does shipping take to Montana?
- Expect 3-5 business days via FedEx Ground from our warehouse. We ship from Pennsylvania, so transit to Bozeman typically takes 4 days with one distribution center transfer—you'll receive tracking within 24 hours of order confirmation.
- Can I return it if it doesn't cycle light loads?
- Yes, within 30 days—but first try adjusting the gas system with the included wrench. It's tuned for 2¾-inch 1⅛ oz loads at minimum; if you're using 7/8 oz target loads, you may need to open the valve completely. Returns require original packaging and incur a $45 restocking fee.
- Does this work with Holosun 507C red dots?
- Yes, directly—the pre-installed Picatinny rail accepts any micro red dot with a standard base. The Holosun 507C mounts securely without adapters, though I recommend using Loctite 242 on the screws to prevent shift under recoil.