[iBots]

Hey,i am making a system,but i need help,i want to make an object,when i click on Z it throws a ball ,how can i make the ball keep moving forward till it hit a player,and when it hit a player it grts destroyed,like when i click on Z it makes an object and moves it forward with the same float Z,just moves forward and destroys when it hit a player,how to detect if it hits a player?
Giving 2 reps