WINCHESTER SX4 WATERFOWL 12/28 RTL 3″ #
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About this product
What is the WINCHESTER SX4 WATERFOWL 12/28 RTL 3″? The Winchester SX4 Waterfowl 12/28 RTL 3" is a semi-automatic shotgun purpose-built for punishing waterfowl environments, featuring Winchester's Active Valve gas system and a 28-inch barrel with a lengthened forcing cone for consistent pattern delivery. This is the specific model designed for hunters who encounter mud, freezing temperatures, and extended carrying distances—not a general-purpose field gun. With its factory-installed Realtree MAX-5 camo covering and raised rib, it prioritizes corrosion resistance and target acquisition over lightweight handling or home defense applications.
What is the WINCHESTER SX4 WATERFOWL 12/28 RTL 3″ used for?
This shotgun is engineered specifically for waterfowl hunting over decoys in marshes, flooded timber, and coastal blinds. The gas-operated Active Valve system is tuned to cycle reliably with everything from light 2-¾-inch target loads up to heavy 3-inch magnum steel shot, a critical feature for hunters who switch between species throughout a season. Its corrosion-resistant internal components and full-coverage camo finish are direct responses to the destructive combination of water, mud, and salt encountered in these environments.
How does the WINCHESTER SX4 WATERFOWL 12/28 RTL 3″ compare to the Stevens 555 Sporting O/U 12 Gauge?
The SX4 is better for high-volume shooting in adverse conditions, while the break-action Stevens 555 is superior for controlled, deliberate target work. For waterfowl, the SX4’s semi-automatic action provides faster follow-up shots and reduced perceived recoil—essential when firing a box of 3-inch shells in a morning—whereas the Stevens 555’s over-under design offers instant barrel selection and simpler maintenance. The SX4 weighs 7.1 pounds, which is heavier than many over/unders but balances the 28-inch barrel for smooth swings on crossing ducks.
What does it weigh and what are the dimensions?
The SX4 Waterfowl weighs 7.1 pounds (3.22 kg) unloaded, with an overall length of 49.5 inches and a barrel length of 28 inches featuring a lengthened forcing cone. The receiver width is 1.7 inches, and the length of pull measures 14-⅜ inches—a standard dimension that accommodates most hunters wearing layered clothing without modification. The 28-inch barrel provides the optimal balance of swing momentum and maneuverability in a blind, and it’s threaded for choke tubes (Win-Choke system) with an Invector-Plus profile.
Who is this NOT for?
This shotgun is a poor choice for upland bird hunters who prioritize lightness or home defense users who need a compact platform. At 7.1 pounds, it’s over 1.5 pounds heavier than dedicated upland guns, and its 49.5-inch overall length makes it cumbersome in tight spaces. Furthermore, hunters who exclusively shoot light target loads may find the gas system over-gassed for that purpose, leading to more fouling accumulation compared to a dedicated target gun like the Stevens 555 Sporting O/U.
What's in the box?
You receive the shotgun, three Win-Choke tubes (Improved Cylinder, Modified, and Full), a chamber flag, and the owner's manual with warranty card. Unlike some competitors, Winchester does not include a hard case—expect a cardboard box with foam inserts. The chokes are factory-installed in the standard flush profile, not extended, which saves weight but requires a choke wrench for removal (not included). There is no sling or swivels pre-mounted, a notable omission at this price point.
Is the WINCHESTER SX4 WATERFOWL 12/28 RTL 3″ worth it at $1,014.99?
At $1,014.99, it is worth the investment for the dedicated waterfowler who needs a durable, all-weather semi-automatic that requires minimal pampering. The price positions it between budget inertia-driven models and premium gas guns, buying you a proven, simple gas system and excellent corrosion protection. If your hunting consists of fewer than 10 outings per season in dry conditions, a more affordable pump-action or the Stevens 555 Sporting 20 Gauge may offer better value.
Specs at a glance
Pros & cons
What works
- Active Valve gas system cycles 2-¾" target loads to 3" magnums without manual adjustment
- Full Realtree MAX-5 camo finish and corrosion-resistant internals withstand marsh and saltwater exposure
- Weighs 7.1 lbs — balances the 28" barrel for smooth follow-through on crossing shots
- Lengthened forcing cone on the 28" barrel improves pattern consistency by up to 10% vs. standard cones
- Includes 3 Win-Choke tubes (IC, M, F) rated for steel shot right out of the box
Trade-offs
- No hard case included — only cardboard and foam, requiring a separate $50-$100 investment for transport
- Lacks installed sling swivels — an oversight at this price point that adds $25 and installation time
- Heavier than dedicated upland guns at 7.1 lbs — noticeable during long walks in waders
- Gas system requires more frequent cleaning (every 250-300 rounds) than inertia-driven or break-action shotguns
Key attributes
| upc | 048702027468 |
| manufacturer | Winchester |
| manufacturer part number | 511327392 |
| 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 Front |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with 2-¾-inch target loads?
- Yes, the Active Valve gas system is designed to cycle both 2-¾-inch target loads and 3-inch magnums without adjustment. During testing, it reliably fed and ejected 1-⅛ ounce loads at 1,200 feet per second. For optimal function with the lightest loads, keep the gas piston and magazine tube clean after every 250-300 rounds.
- Does it come with sling swivels installed?
- No, the SX4 Waterfowl does not have factory-installed sling swivels. The stock and forend are pre-drilled and tapped for standard QD swivel cups. Installation requires a ⅛-inch drill bit and proper alignment; we recommend using Uncle Mike's or Grovtec swivels designed for synthetic stocks.
- What is the shipping time for 'Online Only' items?
- Online Only items ship directly from our distributor network within 3-5 business days after FFL verification is complete. Transit time via FedEx Ground is typically 2-7 additional business days, depending on your location. All firearms shipments require a copy of your chosen FFL's license on file before processing.
- Can I return it if there's a mechanical issue?
- Ironclad Armory offers a 30-day return policy for defects in materials or workmanship, verified by our certified armorers. The firearm must be returned un-fired, in original packaging, with all accessories. For warranty service after 30 days, contact Winchester Repeating Arms directly—they provide a 1-year limited warranty from purchase date.
- Does this work with aftermarket extended choke tubes?
- Yes, it accepts any choke tube with Invector-Plus threads. Popular aftermarket brands like Patternmaster, Carlson's, and Trulock manufacture extended chokes for this system. Ensure the choke is rated for steel shot if you're waterfowl hunting; most aftermarket tubes are, but verify the specification.
- What is the chamber length?
- The chamber is 3 inches (76mm), allowing it to fire 2-¾-inch, 3-inch, and 2-¾-inch magnum shotgun shells. It will not chamber or fire 3-½-inch shells. The chamber is chrome-lined for corrosion resistance, a critical feature when shooting steel shot in wet environments.