Improved vanilla gun 1.0.0

A gun that keeps the same style as the vanilla gun but has more detail and size to it. My aim was to create something that fits well with the other vanilla tools in the game and I think this pulls that off perfectly. I have fixed some of the weird design that the vanilla gun has like a 1 pixel wide barrel and the weird iron sight. Overall the changes just make it look like more of a gun and less of whatever the vanilla thing is.