Well, what you going to do with it? Defend someone or attack?
I didnt buy a water gun cos it was cool, but i must admit it looks kinda cool.
I bought it to defend our chickens from being attacked by dogs. It shoots about 8 m. Theres a dog the neighbours have down the back whos been eying our chickens.
If he starts barking aggressively, i just shoot some water near him and he runs away.
You would defend yourself against anyone who was attacking you.