One of the most infamous pistol designs is the German Luger, formally known as the Pistole Parabellum. The Luger was used extensively in various armed forces throughout Europe in the 1900s, but it’s best known for being the Nazi’s sidearm of choice in World War II. It’s also well known for firing the 9mm cartridge, one of the worlds most popular pistol calibers to this day. The Luger pistols saw plenty of combat and quickly gained a reputation for reliability and longevity. The Germans officially replaced the Luger with the Walther P38 during World War II, but a shortage of production caused the Germans to order an additional 15,000 Luger pistols for the war effort.