A speargun is an underwater fishing implement designed to fire a spear at fish; it can, however, be used as aweapon to fire at any underwater target. A speargun is made up of a spear, a barrel, and a handle containing a trigger mechanism. They can be up to 2 meters long, and are either powered by a rubber band or compressed air.
- In "Training Day, " Lana confronts Archer and Cyril with a speargun when they are leaving ISIS Headquarters via the elevator.
- In "Diversity Hire," Lana uses the speargun to stop Conway escaping from Malory's South Beach apartment with the Whisper Drive plans.