Winchester SX4 Defender | 12 Gauge | 18.5in | 511320395

The Winchester SX4 Defender is a compact, semi-automatic 12 Gauge autoloader built around Winchester’s Active Valve gas system and back-bored barrel technology. It pairs a woodland camouflage synthetic field stock with a Flat Dark Earth (FDE) Cerakote finish on the barrel and aluminum receiver, and includes a set of Invector-Plus choke tubes for patterning. The combination of an 18.5" barrel, Picatinny optics rail and LPA front with ghost-ring rear sight makes this model suited to close-quarters maneuvering and shooting sports.

Product Specifications

• The manufacturer is Winchester.
• The model is SX4.
• The manufacturer part number is 511320395.
• The UPC is 048702026454.
• The gauge is 12 Gauge.
• The action type is Semi-Auto.
• The barrel measures 18.5 inches for compact handling.
• The overall length is 39.5 inches.
• The unloaded weight is listed as 7.12 lbs.
• The stated capacity is 4- 2.75" Shells.
• The maximum chamber size is 3".
• The stock is synthetic in Woodland camouflage.
• The receiver is a FDE aluminum alloy with Cerakote finish.
• The choke system is Invector-Plus with Full, Improved Cylinder and Modified chokes included.
• The sighting and mounting package includes a LPA front sight, ghost-ring rear sight and Picatinny optics rail.

The SX4 Defender is aimed at shooters who need a compact, adaptable autoloading shotgun with modern ergonomics and multiple sighting and patterning options. Its short barrel and optics-ready receiver make it practical for competition stages and field work where quick handling and dependable cycling across a range of loads matter. The included choke set and recoil mitigation features increase its versatility for target, sporting use, and other lawful outdoor applications.

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