anti-aircraft gun Germany or the USSR?

[crx1991]

In 1929, the Bustag front company could not transfer the Flak 30 developments to the Kremlin, they were just being carried out. And I put it, the S5-100 gun. from it, the basis of anti-aircraft systems, and included Lafet Leshchinsky, where large-caliber, automatic systems were practiced in the USSR. Repeating the gun itself was not crowned with success, so the circulation was no more than 100 pieces, taking into account imported components. But still, some samples ended up in the military units of the Red Army in the western districts.