Another simplistic perspective.
Is a handgun's purpose to kill or not to kill?
If you take firearms training are you learning to kill or not to kill?
I would say yes to the first. Philosophically I would say when you transcribe the makers purpose and apply it to an object then you have function. So it's prime function is to kill. You canthereafter use it for other things ie: secondary functions.
If you take firearms training you are therefore using a weapon designed to kill. You are learning how to shoot. The purpose for so doing lies with you.