The Yakovlev Yak-25 (NATO designation Flashlight-A / Mandrake) was a swept wing, turbojet-powered interceptor aircraft and reconnaissance aircraft used by the Soviet Union. When new 'Sokol' radar (RP-6) was finally available, the newly equipped aircraft were designated Yak-25M, with deliveries starting in January 1955. The Yak-25M received a number of other improvements, including recoil dampers for the cannon, upgraded AM-5A engines (with the same thrust), and a slight increase in fuel capacity. In 1955 and 1956 several Yak-25Ms were refitted as testbeds for air-to-air missile armament.