a A GD concussion grenade is mainly used to subdue large groups of opponents, or take out vehichles. The blast, when used against infantry, is usually not lethal, but it causes multiple bone fractures, internal damage, and usually results in unconsiousness. Against vehichles, this grenade can blow the treads right off an Axari tank, and the blast can even rip off the turret. These grenades are very powerful, and are one of the strongest grenades used by the GD.