Tochka-U known in the Western world as SS-21 Scarab-B is an further development of Soviet tactical ballistic missile system Tochka (Scarab-A) that was put into service in 1975. The upgraded complex introduced in 1989 also uses short-range tactical ballistic missile but with significantly improved characteristics: increased the maximum range to 120 km vs. 70 km and CEP of 95m vs 250m for Scarab-A respectively.
Both generations represent mobile missile launch system on the basis of 6x6 wheeled amphibious chassis BAZ-5921 with a maximum road speed of 60 km/h and 8 km/h in water. The front and rear axles are steering. This makes it possible to decrease the turning radius to 7 meters. The vehicle is powered by a diesel engine 5D20B-300 developing 300 hp (220.6 kW) at 2600 torque. It is equipped with two generators type VG-7500, with a capacity of 9 kW each.
The complex itself has been developed for precise strikes on enemy tactical targets, such as control posts, bridges, storage facilities, troop concentrations and airfields. It can also be treated as a non-nuclear "deterrent weapon", however nuclear warheads can be used here as well. The basic warhead is the 9N123F HE-Frag delivering 120 kg of high explosives. The 9N123K submunition warhead can carry either bomblets or mines. The SS-21 can also carry the AA60 tactical nuclear warhead. Other warheads are believed to include chemical, terminally guided warhead, and a smart-munition bomblet warhead.
Currently, in addition to Ukraine and Russia, these systems are also in service in Belarus, Kazakhstan, Slovakia, Poland, Yemen and Syria. At least 15 Tochka missiles were deployed by Russian forces in August 2008 during the South Ossetia war. There are unconfirmed reports saying that both the Ukrainian Army and Pro-Russian rebels used Tochka missiles for a couple of times during the War in Donbass. There exists a YouTube video of a failed Tochka launched, claimed to be in Eastern Ukraine; it is unclear which side the Tochka belonged to.