Winchester Repeating Arms SX4 Extreme Defender, Semi-automatic Shotgun, 12 Gauge, 3 Chamber, 18.5 Barrel, Cerakote Finish, Flat Dark Earth, Woodland Camo Furniture, Pistol Grip Stock, 4 Rounds 511321395 From running a 3-gun competition course to hunting turkey to just keeping handy when camping in the woods, the biggest feature of the SX4 Extreme Defender shotgun is versatility.