The original WWI trench shotgun that remained in WWII service, based on John Browning's Winchester Model 1897. Fires continuously when the trigger is held and the slide cycled — a capability eliminated on the later Model 12. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 1897, USA Weight: 230.4 oz Overall length: 39.6" Status: Discontinued Military use: Yes Intended use: Trench Warfare, Close Quarters, Military