Maybe its all coincidental, but prior to that interview, Biden was constantly being placed "out in front" by his boss. Granted, I don't watch the news all that much, but since that interview, I don't think I've seen him make a public appearance. It seems like they are keeping him in the background lately.
I am still shocked myself that he made those comments. You don't even have to be a "gun guy" to realize just how ignorant (and impractical/unsafe) his advice was.