Here
http://www.fanfiction.net/s/2318355/1/Make-A-Wish its old but I stumbled on it and I've laughed alot even though I'm only on chapter 15 so far. It also has a sequel and a kinda omake collection based in the same universe more or less. Also what do you think of a Harry Potter fanfic where Harry gains a gun or guns starting to be used by muggleborns and squibs but not by plain wizards and witchs?