Having trouble getting fps gun(s) too shoot please help me out now

Hey there it's me Richard Haley once again just letting you all know that I'm now having trouble getting fps gun(s) too shoot bullets out of them, when I press down on the left mouse button. I really really really badly need someone too help me out so please do not ignore my text message at any time when you see this because I'm making a first person shooter type game and I just really really really need too have help from some other person. Yes I have used different scripts and so far, none of them had worked.