Winchester Model 1897
The Winchester Model 1897 was an early pump-action shotgun invented by John Moses Browning. It was so popular that it was used by the US military during both World War I and World War II. It was deadly weapon at short range, especially in trenches, so the military called it "trench gun". Even though the gun was pump action, the shooter could shoot quickly by holding down the trigger while pumping the shotgun.