Winchester Repeating Arms SX4, Semi-automatic, 12 Gauge 3.5, 28 Barrel, Flat Dark Earth Receiver. Mossy Oak Shadow Grass Habitat Stock, 3 Choke Tubes, 4 Round, Bead Sight 511269292 Find the right habitat. The SX4 is a great looking shotgun, but for the all-around waterfowler, Mossy Oak's Shadow Grass Habitat takes it to a new level. SX4 performance has always been at the top. With Habitat camo, it is just a bit higher. The SX4 Hybrid Hunter has numerous features that make it ideal for taking on your next hunt: a TruGlo Long Beard fiber optic front sight, chrome lined chamber & bore, Invector Plus choke tubes (3 included), Active Valve Operating System for reduced recoil, reversible cross-bolt safety, enlarged bolt handle & bolt release and an FDE finished barrel & receiver.