Here in Idaho all the Wal-Marts I have been to sell firearms (long guns only). Some have that spinning case, but think they are all moving to behind the counter.
I would not make a SERIOUS gun purchase at Wal*Mart. I did buy a Ruger 10/22 for my kid, and was about $50-$75 less than I could find anywhere else.
More serious purchases = Sportsmans Warehouse or Cabelas depending on price comparing exact model/caliber, latest was a place called Impact Guns.
I know Gunsmiths are great and do alot, which is why I will use them if I ever need gun work, but am not paying idiotic prices to support them. There is a place here a mom and pop gunshop, and the guy is great (super friendly, and great service) but he wanted about $125 more for a Browning A-Bolt I bought at a Sportsman's Warehouse (Actually over $170 I saved at Sportsmans Warehouse as they also gave a 5% military discount). I like the smile and great service, but I like the $$$ in my pocket more.