The 9K52 Luna-M (Russian: Луна; English: moon) is a Soviet short-range artillery rocket system. The 9M21 rockets are unguided and spin-stabilized. Its GRAU designation is 9K52, and its NATO reporting name is FROG-7. “FROG” is an acronym for “Free Rocket Over Ground”.
Additional Information: en.wikipedia.org/wiki/FROG-7