I'm no connoisseur of the second amendment legal debate, but it does seem odd that the 1st Amendment applies to the states through the incorporation clause, when its very language states "Congress shall make no law," while the 2nd Amendment, which contains no such express limitation, does not. The finding that the discrimination against otherwise fully qualified non residents getting permits does not violate the privileges and immunities clause seems ludicrous.
But the guild doesn't like guns. They're dangerous and tend to be popular with sans culotte element.