I enjoy the show. Sure it has it's problems with some gun related things, but that's nothing out of the ordinary for television or movies.
A NOTE: TV and Movies are not firearm documentaries. The purpose is to tell a story, the guns are part of the stories. The guns are NOT the story.
Also, if one can suspend disbelief long enough to buy into the undead walking the earth and eating humans whole, then a few discrepencies with gun facts aren't that big of deal.