[Suzerain of Sheol]

Well, the gun normally comes with 0% accuracy, so the bullets end up going everywhere, but if you get lucky it can spawn as high as like 45%, I think.

Edit: @Dolly, Knoxx is easily the best one. The Armory has over 100 chests to loot in it and there's a glitch in the floor you can use to not activate the timer that kicks you out usually (if you're the sort who would do that sort of thing. I am. :p)