http://swololol.com/rd?f=Gamemode_GunGameIt took me 30 seconds to figure out how to find this. Please try the simple act of searching for it yourself to see if what you're looking for already exists, if only to save yourself from having to wait for someone to do that for you.
It doesn't load to the link
That's odd. It was working when I posted it.Whatever, here's a copy I grabbed from it earlier.