I've only seen tv commercials for outdoors sportings stores which sell firearms. I do recieve flyers in the mail from a local outdoor sporting store with their own out door range advertising firearms, pistol and rifle. But only because I purchased a pistol from them. Whoa, wait scratch that part about the commercials. I have seen a commercial for a store dealing in nothing but firearms. It was for Collectors Firearms. I've seen the commercial once or twice. I've even passed by the place a few times, just haven't stepped inside. I would love to but just don't have the cash to splurge. I'm sure if local firearm vendors had the cash they would have local commercials.
http://www.collectorsfirearms.com/