Thanks for the reply!
The thing is that i want to tap on weapon 2 to select it, and then, when i tap on the mole, weapon 2 will spawn under my finger,kill the mole and destroy it self.
Then, whenever i tap a mole, weapon 2 will still spawn (since i have selected it) but if i tap on weapon 1,3 or 4, that other weapon will spawn under my finger whenever i touch the screen in order to kill the differed type o mole...