Welrod

The Welrod is a British bolt-action, magazine-fed, suppressed pistol designed during World War II by Major Hugh Reeves at the Inter-Services Research Bureau. Approximately 2,800 Welrods were made during the war and 14,000 in total when post-war examples are included. The Welrod was used primarily by the British Special Operations Executive, the American Office of Strategic Services, and Resistance forces, and was designed for use by irregular forces and resistance groups. It is an extremely quiet gun due to its integrated suppressor, which takes the form of a 1.25-inch-diameter cylinder, about 12 inches long, and has a ported barrel that releases powder gases gradually into the rear of the suppressor, reducing the sound of firing. The Welrod was produced in several models, including the Mk I, Mk II, and 9mm Mk I, and was marked with a serial number and some inscrutable symbols and letters, but had no markings indicating its manufacturer or country of origin.learn more on wikipedia