The Water Gun is a weapon in Beat the Boss 2. It is the first weapon you can make in the Workshop. The gun fires a continuous spray of water which is somehow powerful enough to hurt the boss. After some continuous firing it will lose all pressure and requires an automatic recharge of a few seconds.
The Water Gun deals damage to the boss only when it hits the boss directly, not when it collides with a wall first, then the boss.
This weapon can only be crafted.