Can't say I'm entirely interested in this uninspired gamemode, but I'll play along. I quite like the Double Barrel Shotgun, and loved it ever since I blew both a man's legs off in multiplayer. It's got excellent stopping power and certainly births the term "more bang for your back". Limited ammo and range, best used only in close-quarters encounters, i.e indoors.
PS: What is the Wonder Waffle? Like a superhero toasted beverage?