arms

what do you think is the best idear when you you want to manage your arms. because i got rocket in my game but i don''t know the way to use them all. what is the best way do you have to load every time the model because i made it on 3dsmax.and the same thing for the texture of explosion . every time i press for example a key i have to create a new objet rocket so do i have to load it every time it would not be fast for the game. and at this time i can have just one rocket. if i press again it destry the rocket that was and create a new one before it gate on collision with the world . what is the best idaer at your opinion ???????????