Ukrainian servicemen from 24th brigade operate a BM-21 Grad near the frontlines of Toretsk, Ukraine on March 18, 2023.Photo by Wolfgang Schwan/Anadolu Agency via Getty Images Ukrainian troops are using a Soviet-era rocket launcher, the BM-21 Grad, to hit Putin's forces. The vintage weapon is called "grandma" by Ukrainian crews, The Wall Street Journal reported. The Grads are"not the most accurate" but are "effective for suppression fire," said a military expert Ukrainian commanders have been using Cold War-era rocket launchers to strike back against Russia in its counteroffensive, the Wall Street Journal reported.