Flooded timber layout blinds marshes etc. the vertical striping of Mossy Oak Bottomland is a highly effective camouflage pattern in most environments. History proves it with Bottomland still being used decades after its introduction. Putting Bottomland on the Winchester Super X4 confirms that this shotgun is up for rigorous hunting conditions. And for the first time ever left-handed waterfowlers can have the concealment speed and reliability benefits of this great shotgun in a model built for them.SX4 left-hand models are the mirror image of the shotgun that rules the skies. The SX4 is based on the bullet proof Active Valve gas operating system that was the core foundation of both the SX3 and SX2. The Active Valve has been tested tried and tweaked to perfection to make it Winchester most trusted autoloader in the marsh. In addition to the proven performance of the Active Valve you get all of the other advantages of the SX4: Better balance better controls and ultra-reliable internal operating components. RECEIVER - Aluminum alloy; Mossy Oak Bottomland camouflage finish BARREL - Chrome plated chamber and bore; Mossy Oak Bottomland camouflage finish; Ventilated rib ACTION - 12 gauge - 3A 1/2" and 3" chamber; Gas operated with Active Valve system STOCK - Composite; Mossy Oak Bottomland camouflage finish FEATURES - Three Invector-Plus choke tubes (FMIC); TRUGLO fiber-optic sight; Inflex Technology recoil pad; Length of pull spacers; Larger cocking handle bolt release and reversible safety button for faster operation; Sling swivel studs