I saw that program just the other night. The Stossel interview was well worth it. Glenn Beck definitely supports gun rights and explains it in such a way as for most of the general public to accept. As another plus, he even devoted an entire episode to a Ron Paul interview even though he admittedly disagreed with the candidate on some issues.
Just to add, I think he may have misunderstood about the gunowners' registration that Hillary is supposedly against. If he doesn't know that gun owners don't need to be registered (in most places) I don't think its from lack of trying. Like someone else had said its not his specialty.