Winchester's SX4 is a top contender in the world of semi-automatic hunting shotguns. Building on its predicessor, the SX3, the SX4 has increased the function, handling, and ergonomics, to maximize potential while out in the field.
 
From the manufacturer:
SX4 Features
Synthetic stock with improved ergonomics, A smaller grip and textured gripping surfaces give your hands a sure, non-slip grip. The non-glare matte black finish won’t spook wary game
Back-bored technology provides optimum shot patterns that are dense and even
Invector-plus choke tube system offers consistent patterns to match your target situation
Hard chrome-plated chamber and bore make these surfaces highly resistant to wear and corrosion
Truglo® long bead™ fiber-optic front sight offers a true, precise sight picture
Ventilated rib gives you a smooth, clean sighting plane
Mechanical Features
Self-adjusting active valve system cycles a wide variety of loads while reducing “felt recoil”
Quadra-vent™ ports vent excess gases for cleaner operation
Drop-out trigger group allows for easy cleaning
Ambidextrous crossbolt safety is easily reversible
Larger bolt handle and bolt release button is faster and easier to operate
Length of pull spacers allow stock adjustments to achieve a perfect fit
Inflex technology recoil pad directs “felt recoil” down and away from your cheek to reduce flinch and fatigue
 
 
 
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