The Walther PP series pistols include the Walther PP, PPK, PPK/S, and PPK/E. They are blowback-operated semiautomatic pistols manufactured by Carl Walther GmbH Sportwaffen in Germany and under license from Walther in France and the United States. These pistols feature an exposed hammer, a double-action trigger mechanism, a single-column magazine, and a fixed barrel which also acts as the guide rod for the recoil spring. The most common variant is the Walther PPK, the Polizeipistole Kriminalmodell (Police Detective Pistol Model), indicating a more concealable pistol. The PP was released in 1929 and the PPK in 1931; both popular with European police and civilian shooters, for being reliable and concealable. During World War II they were issued to the German military and police, the Luftwaffe, and Nazi Party officials; Adolf Hitler killed himself with his PPK in the Fhrerbunker in Berlin. Moreover, the Walther PPK pistol is fictional secret agent James Bond\'s signature gun in the novels and most films. Fleming\'s choice of the Walther PPK directly influenced its popularity and its notoriety.The PP and the PPK were among the world\'s first, successful double action semi-automatic pistols that were widely copied, but still made by Walther.