WWI Trench Mauser

As World War One stagnated into trench warfare, snipers and machine guns quickly proliferated, and exposure above the parapet of one’s trench could be extremely hazardous. This leaves one with the question of, how to shoot back without risking a bullet? One answer that was devised was to mount a rifle to a periscope. That way the rifle could be lifted up to get a clear shot at the enemy trenches while the shooter remained safely out of sight using mirrors to see his s