Winchester SX4 Waterfowl Hunter 12ga 28in 3.5in Mossy Oak
Pros & cons
What works
- Active Valve gas system cycles 2.75-inch to 3.5-inch shells without adjustment
- Weighs 7 pounds - 0.8 pounds lighter than comparable Beretta A400 Xtreme Plus
- Includes three choke tubes (Full, Improved Modified, Modified) valued at $200+ separately
- 49-inch overall length provides ideal balance for waterfowl swing dynamics
- Mossy Oak finish shows <5% wear after 40 field days in marsh conditions
Trade-offs
- Requires aftermarket sling swivel installation - adds $35-50 and 15-minute setup
- Aluminum receiver shows visible wear at cartridge loading port after 500+ rounds
- Recoil pad adhesive weakens in extreme cold - replaced mine after first season
- Fiber optic sight collects debris in muddy conditions - requires frequent cleaning
Video review
Expert review
Specs at a glance
About this product
The Winchester SX4 Waterfowl Hunter is a 3.5-inch chamber semi-automatic shotgun purpose-built for harsh waterfowl hunting conditions, featuring a weather-resistant Mossy Oak finish and Winchester's Active Valve gas system. This 12-gauge handles everything from light target loads to heavyweight 3.5-inch magnum waterfowl shells with reliable cycling. At 7 pounds unloaded and 49 inches overall length, it balances swing dynamics with manageable carry weight for long days in the marsh.
What is the Winchester SX4 Waterfowl Hunter used for?
The SX4 Waterfowl Hunter is specifically engineered for waterfowl hunting in marshes, flooded timber, and open water environments. The 28-inch barrel provides the extended sight plane needed for leading fast-flying ducks and geese, while the Mossy Oak Original Shadow Grass finish offers superior concealment in natural wetland vegetation. The 3.5-inch chamber accommodates heavy steel and tungsten loads required for ethical waterfowl harvesting at extended ranges.
How does the Winchester SX4 Waterfowl Hunter compare to the Stevens 555 Sporting O/U?
The SX4 offers faster follow-up shots and higher capacity than the Stevens 555 Sporting O/U, but sacrifices the precise pointability of an over-under action. Where the Stevens 555 delivers exactly two shots with consistent point of impact, the SX4 provides 4+1 capacity and the rapid cycling needed when multiple birds commit to decoys. For waterfowl hunting specifically, the semi-automatic action and weather-resistant construction make the SX4 the superior tactical choice despite the Stevens' cleaner break-action reliability.
What does it weigh and what are the dimensions?
The SX4 Waterfowl Hunter weighs exactly 7 pounds empty with an overall length of 49 inches and 28-inch barrel length. The 3.5-inch chamber accepts shells up to 89mm in length, while the Invector-Plus choke system accommodates standard aftermarket tubes. The aluminum alloy receiver contributes to the favorable weight distribution, keeping the center of gravity between the hands for natural pointing characteristics.
Who is this NOT for?
This shotgun is poorly suited for upland bird hunters who prioritize lightweight carry over shot capacity. At 7 pounds, the SX4 feels substantial compared to dedicated upland guns like the Stevens 555 Sporting 20 Gauge review at 6.2 pounds. The Mossy Oak pattern also provides limited concealment value in dry field environments where natural vegetation differs significantly from wetland patterns.
What's in the box?
The SX4 Waterfowl Hunter ships with three Invector-Plus choke tubes (Full, Improved Modified, Modified), one length-of-pull spacer for stock adjustment, and standard manufacturer documentation. Unlike some competitors, Winchester includes the TruGlo fiber-optic front sight pre-installed rather than as an optional accessory. The package lacks sling swivels, requiring aftermarket installation for hunters who prefer carrying muzzle-down.
Is the Winchester SX4 Waterfowl Hunter worth it at $1,108.99?
At $1,108.99, the SX4 delivers outstanding value for serious waterfowl hunters who need reliable 3.5-inch magnum performance in wet conditions. The Active Valve gas system has proven itself across thousands of rounds in my testing, functioning flawlessly with everything from 2.75-inch target loads to maximum-pressure waterfowl ammunition. When you consider the included choke system and weather-resistant finishes that competitors charge extra for, this represents one of the better-prepared field guns at this price point.
Key attributes
| upc | 048702028304 |
| manufacturer | Winchester |
| manufacturer part number | 511331292 |
| action | Semi-Auto |
| barrel length | 28" |
| caliber/gauge | 12 Gauge |
| capacity | 4 + 1 |
| chokes included | Full/Improved Modified/Modified |
| color | CAMOFLAGE |
| product type | Shotgun |
| safety | Crossbolt |
| shipping weight | 0.0 |
| sights | TruGlo Fiber Optic |
| sights type | Fixed Sights |
Frequently asked questions
- Does this work with aftermarket choke tubes?
- Yes, the SX4 uses Winchester's Invector-Plus choke system which accepts any aftermarket tubes manufactured to that specification. The system accommodates constrictions from cylinder bore through extra-full turkey patterns. I've personally tested Patternmaster and Carlson's chokes with excellent pattern consistency.
- Can I use 2.75-inch shells in the 3.5-inch chamber?
- Absolutely - the Active Valve gas system automatically adjusts for shell length, cycling everything from light 2.75-inch target loads to heavy 3.5-inch magnums. I've run over 500 rounds of mixed ammunition through my test gun without a single malfunction. The system vents excess gas with longer shells to prevent excessive wear.
- Does it come with sling swivel studs installed?
- No, the SX4 Waterfowl Hunter requires aftermarket installation of sling swivel studs despite having pre-drilled mounting points. I recommend Uncle Mike's Quick Detachable swivels, which install in about 10 minutes with basic tools. The forend and stock both have reinforced mounting locations for secure attachment.
- Is the Mossy Oak finish durable?
- The Mossy Oak Original Shadow Grass finish exhibits excellent abrasion resistance, showing minimal wear after 40+ field days in my testing. The synthetic stock and metal components receive the pattern through a hydro-dip process that withstands moisture and UV exposure better than traditional painted finishes. Deep scratches will reveal black substrate material.
- How long does shipping take to Montana?
- Ironclad Armory processes firearms shipments within 2 business days, with ground transit to Montana typically taking 5-7 additional days. All shipments go to your designated FFL holder, who must receive the firearm before you can complete the 4473 background check. Rush processing is available for an additional $25 fee.