The harpoon gun comes from supply drops throughout the map and has a reload time of 4 seconds. It takes two hits to knock an opponent down and three to kill. To save ammo, it is best to finish them off with a stomp. The harpoon gun comes with 5 harpoons. If you have purchased the 200 robux "More harpoons" gamepass, it will come with 18 harpoons instead.
Like the crossbow, the harpoon gun is a projectile based weapon and works best at a distance. You will have to pre-aim players in order to make projectiles hit.
It complements any weapon but works especially well with the crossbow. Firing the crossbow then quickly switching to the harpoon gun and shooting allows you to safely finish a target without going closer to stomp them.