Abstract: A water toy gun has a barrel including a nozzle, a handgrip with a trigger on the barrel, and a reservoir in the barrel for containing water. A manually-operated piston-in-cylinder associated with the barrel is included for increasing the pressure of water in the reservoir to thereby eject water out via the nozzle upon pressing of the trigger. The barrel has a front barrel portion including the nozzle and a rear barrel portion. The reservoir is formed by a front chamber provided in the front barrel portion and a rear chamber provided in the rear barrel portion. The handgrip is located at a position between the front and rear barrel portions to assist in balancing the weight of water in the front and rear chambers.