I noticed this same sign at the Gander Mountain in Fredericksburg last weekend. Forgot about it until just now. They must have decided to clear things up with the various stores.
That is just awesome!
I've noticed those signs at Gander Mountains and similar ones at Bass Pro for at least a couple years now. It makes it quite easy for the employees to remember their carry policy. I think Sportsmans Warehouse had something similar when they were here in Virginia as well.