Winchester Repeating Arms SX4 Extreme Defender, Semi-automatic Shotgun, 12 Gauge, 3 Chamber, 18.5 Barrel, Cerakote Finish, Flat Dark Earth, Woodland Camo Furniture, 4 Rounds 511320395 From running a 3-gun competition course to hunting turkey or just keeping handy when camping in the woods, the biggest feature of a Winchester SX4 Defender shotgun is versatility. Like all SX4 models, these autoloaders are powered by the ever reliable Active Valve Gas System that offers superior reliability with a wide range of loads and impressive cycling speed. The compact, 18-1/2" barrel is easy to maneuver in the brush and through range obstacles.