Winchester's SX4 was based on the SX3's gas operated Active Valve system then refined with improved balance, controls, and internal operating components to make it a worthy successor. It has a larger cocking handle, bolt release, and trigger guard opening for gloved fingers. The SX4 Waterfowl Hunter features an all-over Realtree Max-5 camouflage finish, TruGlo fiber-optic sight, length of pull spacer, and a reversible safety button for faster operation. This model has a 26" barrel with a 3" chamber.