Winchester SX4 28" 12ga Shotgun 3.5" Semi-Auto Matte - 511205292
- Capacity-Rounds:
- 4
- Caliber-Gauge:
- 12 Gauge
- Hand:
- Right Hand
- Barrel Length:
- 28"
- Barrel Length Range:
- 28" to 28.99"
- OAL:
- 49"
- Receiver Description:
- Black Aluminum
- Chamber:
- 3.5"
- Weight:
- 7.20 lbs
- Action:
- Semi-Auto
- Safety:
- Ambidextrous Crossbolt
- Stock Finish Group:
- Black
- Stock Description:
- Fixed w/Grip Panels
- Sights:
- TruGlo Long Bead Fiber Optic Front
- Weight Range:
- 7 lbs to 7.99 lbs
- Barrel Description:
- Vent Rib Chrome-Lined
- Chokes Included:
- F,M,IC
- Choke Configuration:
- Invector-Plus Flush
The Winchester SX4 is a proven semi-automatic shotgun built for hunters and sport shooters who demand reliability without compromise. This 12-gauge semi-auto features a 28-inch barrel chambered for 3.5-inch magnum loads, giving you the flexibility to handle everything from waterfowl to upland game without swapping guns. The matte black receiver and barrel keep glint out of the field, while the composite stock and foregrip reduce weight without sacrificing durability—at 7 pounds, it's light enough for a full day afield but substantial enough to manage recoil cleanly.
Winchester engineered the SX4 with a chrome-plated chamber and bore for corrosion resistance in wet conditions, and the Inflex 1 recoil pad with a hard heel insert tames felt recoil so you can stay focused on your shots. The fiber optic front sight cuts through low light, and the textured grip panels give you a secure hold even with wet or gloved hands. Straight from the box, you get three Invector-Plus flush chokes—Full, Modified, and Improved Cylinder—letting you dial in the right pattern for your hunting situation, plus a flat choke wrench to swap them in the field.
With a 4-round magazine capacity and an overall length of 49 inches, the SX4 balances maneuverability in brush with the sight radius you need for precision. The 14.25-inch length of pull suits most shooters comfortably, and the aluminum alloy receiver keeps the gun nimble. Whether you're working a duck blind at dawn or hunting pheasant over a pointer, the Winchester SX4 handles the job with the straightforward, no-nonsense performance hunters have relied on for generations.
Key Features
- 28-inch barrel in 12-gauge, chambered for 3.5-inch magnum shells
- Semi-automatic action for faster follow-up shots and reduced felt recoil
- Chrome-plated chamber and bore resist corrosion in wet hunting conditions
- Invector-Plus flush choke system with three chokes included (Full, Modified, Improved Cylinder)
- Fiber optic front sight for low-light visibility
- Inflex 1 recoil pad with hard heel insert minimizes recoil fatigue
- Composite stock and foregrip keep weight down without sacrificing durability
- Textured grip panels provide secure handling in wet or gloved conditions
- Aluminum alloy receiver and steel barrel in matte black finish
- Sling swivel studs for attachment of a carry sling
Specifications
| Gauge | 12 |
| Chamber Length | 3.5 inches |
| Barrel Length | 28 inches |
| Overall Length | 49 inches |
| Length of Pull | 14.25 inches |
| Weight | 7 lbs |
| Drop at Comb | 1.75 inches |
| Drop at Heel | 2 inches |
| Magazine Capacity | 4 rounds (tubular) |
| Receiver Material | Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Composite |
| Choke System | Invector-Plus Flush |
| Chokes Included | Full, Modified, Improved Cylinder |
| Front Sight | Fiber Optic |
| Receiver Finish | Matte Black |
| Barrel Finish | Matte |
| Stock Finish | Matte |
| Rib Width | 0.25 inches |
| Recoil Pad | Inflex 1 Small with Hard Heel Insert |
| Sling Swivel Studs | Matte Blued |
Frequently Asked Questions
What chokes come with the Winchester SX4?
The shotgun ships with three Invector-Plus flush chokes: Full, Modified, and Improved Cylinder. You can swap them in seconds using the included flat choke wrench, allowing you to adjust your shot pattern for different game and ranges in the field.
Can the Winchester SX4 handle 3.5-inch magnum ammunition?
Yes. The SX4 is chambered for 3.5-inch shells, so it will cycle both standard 2.75-inch and 3.5-inch magnum loads. This flexibility is particularly valuable for waterfowl hunters who may want extra velocity and shot capacity in a single gun.
What is the length of pull, and will it fit me?
The Winchester SX4 has a 14.25-inch length of pull, which is the distance from the trigger to the center of the recoil pad. This is a standard adult dimension and suits most shooters comfortably; if you're exceptionally tall or short, you may want to handle one in a store to confirm fit before purchase.
Is the SX4 suitable for waterfowl hunting?
Yes. The chrome-plated chamber and bore resist corrosion from wet conditions and steel shot, and the 3.5-inch chamber accommodates the heavier loads waterfowl hunters typically use. The composite stock is durable in harsh field conditions, and the semi-automatic action reduces felt recoil during long hunting sessions.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
Email: [email protected]
- Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
- The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
- The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
- Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
- Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
- Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.

