Ping.
That region seems to have always produced intelligently designed and well crafted weapons, for a long long time.
(Sorry, Polinar Tactical reference.)
CZ makes some of the best weapons in the world.
Rather easily put out of action— in the 41 years or so since this weapon came out. Afghanistan being filled with former soviet bloc weapons, nevertheless. Counter fire weapons systems and detection/computation makes this an eminently past it’s time weapon for any modern adversary (like... the US).
Even in the 70’s Hughes already had counter artillery systems well on their way. UAVs and other systems today. That’s the game.
When I was in the Army in the 1970’s some people were trying to get auto-loaders into tanks and SP Arty.
Gerald Bull design?