The BM-21 "Grad" () is a self-propelled 122 mm multiple rocket launcher designed in the Soviet Union.Splav 122 mm BM-21 multiple rocket launcher family (Russian Federation), Multiple rocket launchers, Jane's Armour and Artillery. The system and the M-21OF rocket122 mm BM-21 Grad-series rockets (Russian Federation), Artillery rockets , Jane's Ammunition Handbook were first developed in the early 1960s, and saw their first combat use in March 1969 during the Sino-Soviet border conflict.
