Winchester SX4 24" 20ga Shotgun 3" Semi-Auto Matte - 511205690

The Winchester SX4 semi-automatic shotgun in 20-gauge is a purpose-built hunting platform that brings genuine ergonomic refinement to the field. This 24-inch barrel version with a matte black finish delivers the handling speed and shot-to-shot reliability serious upland hunters and clay shooters demand, without the flash that spooks game. Winchester engineered the SX4 around real feedback from the field: larger controls that work in wet and cold weather, a redesigned grip that feels thinner and points naturally, and textured forearm panels that hold steady whether you're gloved or bare-handed.

Where the SX4 really separates itself is in its mechanical foundation. The self-adjusting active valve system cycles everything from light field loads to heavy magnums while managing recoil through an Inflex recoil pad that directs felt energy down and away from your cheek—a feature that cuts fatigue on long hunting days and helps eliminate flinch. Back-bored barrel technology and hard chrome plating ensure dense, even patterns and long-term corrosion resistance, while the Invector-Plus choke tube system gives you the flexibility to match your load to the shot situation. A drop-out trigger group makes cleaning field-simple, and the ambidextrous crossbolt safety (easily reversible for lefty shooters) won't slow you down when the moment comes.

At 6 lbs 8 oz with a 14.25-inch length of pull, this 20-gauge handles like a natural extension of your body—nimble enough for tight cover, balanced enough for all-day carry. The TruGlo fiber-optic front sight delivers a crisp sight picture in low light, and the vented rib keeps your head in the same spot for consistent shot placement. Winchester ships this model with length-of-pull spacers so you can fine-tune the fit to your frame, and a 4-round magazine capacity keeps you competitive at the range or ready in the field.

Key Features

• Self-adjusting active valve system cycles light to heavy loads while managing recoil
• Back-bored barrel with hard chrome-plated chamber and bore for dense patterns and corrosion resistance
• Inflex recoil pad directs felt energy away from cheek to reduce flinch and fatigue
• Invector-Plus choke tube system for pattern flexibility across load types
• Redesigned ergonomics with textured gripping surfaces and smaller pistol grip for natural pointability
• TruGlo long-bead fiber-optic front sight for low-light clarity
• Drop-out trigger group for easy field cleaning
• Ambidextrous, reversible crossbolt safety
• Larger bolt handle and release button for faster operation in adverse conditions
• Length-of-pull spacers included for custom stock fit
• Matte black non-glare finish

Specifications

Frequently Asked Questions

What ammunition does the Winchester SX4 20-gauge accept?

The SX4 is chambered in 3-inch, which means it will safely cycle 2.75-inch and 3-inch 20-gauge ammunition. The self-adjusting active valve system is designed to handle a wide variety of loads across that range, from lighter field loads to heavier magnum rounds.

What chokes come with this shotgun?

The SX4 features the Invector-Plus choke tube system, which allows you to swap chokes to match different hunting scenarios and load types. Specific chokes included are not detailed in the product specs—confirm with your dealer what tubes ship with your gun.

Can a left-handed shooter use the safety?

Yes. The ambidextrous crossbolt safety is easily reversible, so left-handed shooters can set it up for natural thumb operation without any gunsmithing.

Is the length of pull adjustable?

The SX4 ships with length-of-pull spacers that allow you to customize the stock fit to your frame. The base length of pull is 14.25 inches, and the spacers let you dial it in for proper cheek weld and comfort.