The modernized A-35M system began development in accordance with a resolution of May 1968, which designated Vympel as the Central Thematic Centre (NTTP) for future anti-ballistic missile development in the Soviet Union. In 1970 the enterprise was reorganized as TsNPO Vympel, and in 1992 as MAK Vympel, a public corporation, headed by V I Markov.
1000 engineers and technicians were assigned tot he project, headed by A G Basistov, who had previously completed the anti-ballistic missile work at KB-1 successfully. In total ten research institutes and ten factories participated in development and construction of the A-35M anti-ballistic missile system. The state trials began in May 1977, and the system was accepted for production in 1978. The A-35M's main command-computing center would receive data from several separate Duna-3M radar positions, arranged several dozens of kilometers outside of Moscow. The firing complexes, located in a ring 100 km outside of Moscow, used Tobol and Yenisei equipment with the A-350R missile, which was equipped with a nuclear warhead. In response to US plans to base IRBMs in Western Europe, the modernized Duna-3U radar featured a dedicated sector search to watch for incoming missiles launched from the territory of West Germany. Phase 3 tests of the A-350 missile were conducted in connection with the new system elements in 1976-1977. They included 2 launches of the A-350R and 3 launches of the A-350Zh against R-12 IRBM targets, and 2 launches of the A-350Zh against faster R-16 IRBM targets.
Radars: Don-2N Pill Box early warning radar, range 6000 km. Hen House early warning radar, VHF band, range 6000 km. Dog House target acquisition radar, VHF band, range 2800 km. Cat House target acquisition radar, VHF band, range 2800 km.