Yes, Shauna keeps a loaded gun secured under her coffee table.
That zombie head is, of course, one of the new zombie heads from the first line of collectible minifigures. Graciously donated along with the fifteen other first line by Mr. Chris Doyle of Reasonably Clever. Of all the collectible minifigures this is the one I had plans for in the comic, so this is the one I am most grateful for.