Fergus used the grappling hook gun during the raid on Deathhead's compound.
Grappling hook gun is a tool used by the Allies force during the raid on Deathead's compound. The gun fires a grappling hook so the soldiers can climb the wall of Deathhead's compound. Afterwards, it was never used, seen or mentioned again.
Gallery[]
Concept art of the grappling hook gun, along with a hand grenade case and machine gun turret.
B.J. hooking up.