Grenadier droids were designed with a small, cylindrical profile and were equipped with four, crab-like legs not unlike those of a droideka. Armed with dual grenade launchers, they were capable of launching a steady barrage of bombs at enemy personnel. They sacrificed firepower for mobility, however, as they lacked the ability to coordinate movement with attack; they could not deploy their weapons without rendering themselves completely immobile. As such, they were relegated to support roles.