The development of a second generation of Soviet tube-fired guided projectiles began in the 1970s. The Kobra missile system was in competition with the IR-guided Gyurza system. The IR guidance system of the Gyurza missile proved troublesome and the Kobra was put into production. The 9K112 was first mounted on a new version of the T-64B in 1976. The later T-80B, in 1978, was also armed with this system. The Gyurza system continued to be developed, dropping the IR guidance system in favour of radio command guidance - it was then developed into the "Shturm" or AT-6 Spiral.