Winchester Super X2™, 3" & 3 1/2" Magnum Composite
http://www.winchesterguns.com/products/catalog/historic-detail.asp?family=009C&mid=511034

3 1/2" Composite
With a sleek, low-luster black finish under a tough Dura-Touch® coating on a composite stock and forearm, the Super X2™ 3 1/2" Magnum Composite is the original workhorse that started the SX2 revolution. Built to perform in the worst conditions, the reliable Super X2 3 1/2" action is built to shoot factory field loads from 2 3/4" (1 1/8 oz.) to heavy 3 1/2" magnums, thanks to efficient, reliable gas operation. This model also has a back-bored, Invector-Plus™ ventilated rib barrel with a white bead front sight. Sling swivel studs are included.
3" Composite
Never let bad weather ruin your hunt with the Super X2™ 3" Composite. From the reliable gas operating system, to the rugged composite stock and forearm with Dura-Touch® Armor Coating, to the low luster finish on exposed metal surfaces, the 3" Super X2 Composite is a tough, reliable shotgun. The simple gas-operated action allows you to shoot the heaviest factory 3" magnums, 2 3/4" (1 oz.) field loads and everything in between with reduced recoil and allows for unbelievably fast follow-up shots. Sling swivel studs are included.