based on my research from watching zombie movies and the sharknado movies...you need more than guns. Medieval maces, chainsaws are good things to acquire.
All of the old school hatchet and ax men who've spent a weekend with me and Mrs. Z send us thank you notes: "You've opened my eyes. I'll never go back to chopping up zombies by hand again."
[And no, the noise does not draw them. They recognize the sound of a chainsaw and leave our cabin alone.]