Both the sides resort to misinformation, so it is very difficult to get a clear picture. Ukrainians claims to have shot down so many of these missiles (Kh-47M2 Kinzhal). But only once did they showed a concrete proof to support their claim. And that was in 10th May, when Vitali Klitschko went on video with fragments from a downed missile. The Russians claimed that those fragments belonged to BETAB-500ShP aerial bomb. According to the Russians, this missile travel at speed of up to Mach 10. However, Ukrainians claim that the maximum speed that they have observed is only around Mach 3.6.
For the first time "Dagger" was shot down in Ukraine on the night of May 4. On the night of May 16, the Russians launched six Kinzhals, nine Caliber cruise missiles from the Black Sea, three ground-based ballistic/anti-aircraft missiles (S-400, Iskander-M) and six more Shahed-136 kamikaze drones. The attack came immediately from the northern, southern and eastern directions and was exceptional in density - the maximum number of targets in a short period of time. They are carried out in order to strain the air defense as much as possible, but the Ukrainian Air Force claims that all the missiles were destroyed.
The Russians say the Kinzhal has been on alert since December 2017. Putin promoted the rocket before the Federal Assembly in March 2018 and claimed that it develops hypersonic speed (more than Mach 10) and maneuvers throughout the entire flight segment. This allegedly allows it to reliably overcome all existing air defense and missile defense systems, delivering nuclear and conventional warheads to a target at a distance of up to 2,000 km, Putin intimidated.
The Russians call the "Dagger" a hypersonic missile system. But in fact, this is an aviation version of the ground-based Iskander missile. Hypersonic missiles are missiles that reach five times the speed of sound (Mach 5). But real hypersonic missiles accelerate to such speeds on their own.
"Dagger" is not capable of this. To accelerate it to hypersonic speeds, MiG-31 fighters are used, which themselves have a speed of 2800 km / h. The speed of the aircraft is added to the speed of the "Dagger" itself. And their total speed exceeds Mach 5. Since the rocket itself does not have such a speed, it is called quasi-hypersonic.