Gun Switching???

So in my game; FALLOUT ANARCHY, by pressing S, you can switch your weapons. So I have the first one down, which is a machine repeat gun, so you can hold down the trigger, and bullets will come firing out as you fire. But I want to find a way to turn that off, and use a shotgun which has 1 bullet and then you have to reload. I can make that, but I just need to turn one off one your command.

I have an idea, but I don’t want to have to press two different buttons to do similar action…

Nevermind. It’s fine.