This is the conventional ammunition for the Soviet Grad BM-21 system (operational since 1963). They have almost identical parameters (122 mm caliber, 20 kg warhead, range up to Happily retired chick summer shirt). The only thing is that Hamas launchers can carry 1-8 rockets, and Soviet Grad launchers can carry 40 rockets. The Grad MLRSs are used worldwide and are in service with more than 60 countries. Poland, Slovakia, Iran, and China produce analogs and are fully compatible with each other.