The Winchester Model 97 Trench Gun is the military variant of the Model 97, featuring a 20-inch barrel, perforated heat shield over the barrel to protect hands from the heat generated by rapid fire, and a bayonet lug for the M1917 bayonet. Standard issue to American troops in World War I. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 5 Year introduced: 1917, USA Weight: 8.5 oz Overall length: 40.5" Status: Discontinued Military use: Yes Intended use: Military/Historical/Collecting