This type of action has set the standard for double-action pistol manufacturers worldwide during the past 90 years. It operates on a straight blowback system and a double/single action with a double-action trigger pull for the first shot and a lighter single-action pull for follow-up shots. The Walther PP (Polizei Pistole) occupies a significant place in firearms history as the first commercially successful double-action semiauto pistol. A number of companies have manufacured PP series pistols.Famously used by Hollywood spy James Bond.First commercially successful DA/SA pistol.Why The Walther PP Series Is Collectable: From WWII to the big screen, the Walther PP Series has forever been tied to history.