Winchester SX4 12 Gauge 26-inch Left-Hand Mossy Oak
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About this product
What is the Winchester SX4 12 Gauge 26-inch Left-Hand Mossy Oak? It is a gas-operated, left-ejecting semi-automatic shotgun specifically designed for left-handed shooters operating in marsh and waterfowl environments. It utilizes Winchester's Active Valve gas system to cycle a wide range of 12-gauge loads, from light 2 ¾-inch target shells to heavy 3 ½-inch magnums. The full-coverage Mossy Oak Shadow Grass Habitat camouflage provides concealment in reedy, grassy settings common to duck blinds.
What is the Winchester SX4 used for?
The SX4 is built for waterfowl hunting, specifically for left-handed shooters in wetland environments. Its gas system reliably cycles light 1-ounce target loads for practice all the way up to dense 1 ¾-ounce BBB steel shot for high-flying geese, making it a true one-gun solution for the marsh. The 26-inch barrel provides a fast swing for close-flushing ducks, while the enlarged controls are optimized for use with bulky winter gloves.
How does the Winchester SX4 compare to the Stevens 555 Sporting O/U?
The SX4 offers faster follow-up shots and less felt recoil than a break-action like the Stevens 555 Sporting O/U, at the cost of increased mechanical complexity. Where the gas-operated SX4 excels in rapid target re-engagement with 4+1 capacity, the over/under Stevens 555 provides instant, foolproof switching between two chokes. For a dedicated waterfowler facing multiple birds, the SX4's semi-auto action is superior; for a disciplined sporting clays shooter valuing absolute reliability and simplicity, the over/under is better.
What does it weigh and what are the dimensions?
Unloaded, the SX4 tips the scales at 7.2 pounds (3.27 kg) and measures 49 inches (124.5 cm) in overall length. The 26-inch (66 cm) barrel is topped with a 7.5mm-wide ventilated rib for a consistent sighting plane. The semi-pistol grip stock has a 14.25-inch length of pull, and the 3.5-inch (89mm) chamber directly dictates the gun's 7.5-inch (190mm) ejection port for reliable extraction of the longest magnum hulls.
Who is this NOT for?
This shotgun is not for a right-handed shooter, as the left-eject configuration will send spent hulls across their field of vision. It is also a poor choice for someone who exclusively hunts turkeys from a fixed blind, where the 26-inch barrel and marsh-specific camo offer no advantage over a shorter, more maneuverable firearm. If your primary use is for home defense, the long barrel and specialized camo are significant liabilities compared to a dedicated 18.5-inch defensive model.
What's in the box?
The gun ships with three Invector-Plus choke tubes (Improved Cylinder, Modified, Full), a TRUGLO fiber-optic front sight bead, a user manual, and a factory-supplied hard case. The choke tubes are precisely tuned for this specific barrel's constrictions, delivering consistent 40-inch patterns at 40 yards with the Modified tube using #4 steel shot. The fiber-optic sight gathers ambient light, providing a bright aiming point in low-light marsh conditions.
Is the Winchester SX4 worth it at $1227.99?
At $1227.99, the SX4 is worth the investment for a dedicated left-handed waterfowler who values a dedicated, reliable gas-operated semi-auto. The price accounts for the specialized left-hand machining, the durable, full-coverage Mossy Oak camo application, and the proven Active Valve system's ability to handle over 500 rounds of mixed loads without a cleaning-related malfunction. For a more general-purpose shooter, a right-hand version or a simpler platform like a Stevens 334 bolt-action rifle may offer better value.
Specs at a glance
Pros & cons
What works
- True left-hand ejection and enlarged controls - eliminates spent hulls crossing a lefty's sight plane.
- Active Valve gas system reliably cycles loads from 2 ¾" target (1145 fps) to 3 ½" magnum (1550 fps) without adjustment.
- Full-coverage Mossy Oak Shadow Grass Habitat camo - no exposed metal to glint in the marsh.
Trade-offs
- At 7.2 lbs unloaded, it's 1.3 lbs heavier than a synthetic-stock Browning Silver left-hand model - noticeable during long carries in waders.
- The 3.5" chamber necessitates a longer, 7.5-inch ejection port, which can allow more debris and moisture into the action than a 3"-chambered gun.
- Left-hand configuration limits aftermarket stock and forend options compared to the ubiquitous right-hand SX4.
Key attributes
| upc | 048702022333 |
| manufacturer | Winchester |
| manufacturer part number | 511283291 |
| action | Semi-Auto |
| atf type | Shotgun |
| barrel length | 26" |
| caliber/gauge | 12 Gauge |
| capacity | 4 + 1 |
| chokes included | F,M,IC |
| package height | 3.3 |
| package width | 9.54 |
| product type | Shotgun |
| safety | Crossbolt |
| shipping weight | 9.4 |
| sights | TruGlo Fiber Optic Front |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with standard Benelli Mobil choke tubes?
- No. The Winchester SX4 uses Winchester's proprietary Invector-Plus choke tube system. These tubes are not interchangeable with Benelli Mobil, Beretta Optima, or Browning Invector threads. You must purchase Invector-Plus specific tubes, which are widely available from brands like Carlson's and Patternmaster.
- Does it fit in a standard 52-inch rifle case?
- Yes, but barely. With an overall length of 49 inches, the disassembled SX4 (barrel removed from receiver) will fit in a standard hard case. For transport with the barrel attached, you will need a case of at least 50 inches internal length, such as a Plano All-Weather AirGlide 52-inch case.
- How long does shipping take to a California FFL?
- For Ironclad Armory, standard ground shipping to a California-licensed FFL dealer typically takes 7-10 business days after processing, which is 1-2 business days after order verification. All firearms shipments are initiated via FedEx with adult signature required upon delivery to the FFL.
- Can I return it if the finish is defective?
- Yes, provided you initiate the return process within 30 days of the firearm's delivery to your FFL. The Mossy Oak Shadow Grass Habitat finish is covered under Winchester's lifetime warranty against defects in materials and workmanship. You must contact Ironclad Armory customer service first; do not ship the firearm directly.
- Does this work with a Carlson's Cremator Long Range choke tube?
- Yes, provided you order the Carlson's Cremator Long Range model threaded specifically for Winchester Invector-Plus. This aftermarket choke is designed to tighten patterns for geese and turkeys, typically delivering a 70% pattern density at 40 yards with heavy T-shot or BBB loads.