how do you make a gun?

How do you make a gun wit ha working scope,GUIS and move with cursor

I don't know much about them but I can tell you that to make the cursor your going to need to have a script that finds the mouse and then you will either have to use the decal that roblox typically has a sight or you can create your own.

I once had a friend that made guns and she said that there were several types of guns that you could make.

That is really all I can help you with, Sorry.

First, you have to learn how tools work:

http://wiki.roblox.com/index.php?title=Tools

Second, you have to know how to script tools.

RBLX guns always confuse me.

Find some FM.