The Winchester Model 1300 Field with 28-inch vent-rib barrel. The predecessor to the SXP, the 1300 featured a rotating bolt head and the first commercially successful inertia-assisted pump action. Produced until 2006 when it was replaced by the SXP. Type: Pump Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 4 Year introduced: 1978, USA Weight: 7.5 oz Overall length: 48.5" Status: Discontinued Intended use: Field, Hunting