Walther Polizeipistole, the original double-action semi-automatic pistol. Designed for German police use, the PP introduced the double-action trigger mechanism that became the template for modern compact pistols. Type: Pistol Action: Semi-Automatic Caliber: 32 ACP Capacity: 8 Year introduced: 1929, Germany Weight: 24 oz Overall length: 6.7" Status: Discontinued Intended use: Police Sidearm, Concealed Carry