The reason why counter-terrorism commandos use shields

(1)A bulletproof shield used by FSB special forces in a 2016 terrorist repression operation in Ingushetia, Caucasus, Russia
(2)Dozens of AK rifles and grenade fragments shot and thrown by terrorists, even directly defending RPG-22 warheads
(3)The point man who held the shield was injured by grenade fragments in the ankle that the shield could not cover, but he performed his duties until the operation was over and died on the way to the transfer due to excessive bleeding