Unlike the first version of the Osa with four missiles, in the Osa-AK modification supplied to the GDR army, the anti-aircraft missile system already carried six missiles placed in rectangular launch tanks.
The latest anti-aircraft missile systems had a target engagement range of up to 10 km and an altitude of up to 5,000 m, and the minimum engagement height for the Osa-AK modification was 25 m, which made it possible to shoot down low-flying targets that were difficult to intercept.