Winchester's Super X3 blends the proven technology of their Active Valve gas system with updated features and distinctive styling to create a line of autoloaders that are ready for any hunting challenge. The SX3's self-adjusting Active Valve ensures speed, recoil reduction, and durability in all conditions. Its stock, grip, and forearm dimensions are slimmer for a lighter, more controlled feel. Contributing to the feeling of lightness is an ultralight alloy magazine tube and recoil spring system that removes a half pound of weight. The lightweight barrel further reduces weight with a narrow profile and a machined rib. Inside the barrel you'll find .742" Back-Bored Technology for the ideal combination of shot uniformity and velocity. A patented next generation Pachmayr Decelerator pad absorbs recoil and the hard heel insert provides a slick surface that won't grab clothing when shouldering. Composite stock with full-coverage camouflage finish. TruGlo fiber-optic sight. Three Invector-Plus choke tubes included.