Ischmasch
The PB (, English: Silent Pistol; GRAU index 6P9) is a Soviet integrally suppressed semi-automatic pistol developed and manufactured by Izhevsk Mechanical Plant, based on the Makarov pistol; since the merger of Izhevsk Mechanical Plant and Izhevsk Machine-Building Plant to form Kalashnikov Concern, it has continued to be manufactured by Kalashnikov Concern. It entered service in 1967.