Althought designed by Kalasknikov, the weapon's moving parts are not interchangable with those of the AK-series weapons. The Soviets introduced the basic PK machine gun in 1964. The vechicle-mounted PKT continues to be standard equipment on many armored fighting vechicles. The following data comes from Janes Infantry Weapons 1995 - 1996 . This entry covers the PK machine gun.
Adjustments have to be made for other models.
Two PK machine guns firing rounds. Official Kalashnikov home page - provides comprehensive information on Kalashnikov arms. Military Parade - the latest information from the Russian defence industry. Department of the Army, June 1991. Nedelin, A. Kalashnikov Arms .