How do I make guns an wepons and how do I make them kill ppl?

[Kirota]

How do I make a gun and how do I make It shoot?
Also how do I make inventory items do something?

[Ashen]

Try reading this recent thread which asks the same thing. You could also try a forum search - this has been asked and answered before (in this thread for example, although the code is a little out of date in places).