Over at Volokh, Professor Bob Cottrol reports on the ruling, which would appear to turn Puerto Rico into a shall-issue jurisdiction. Professor Cottrol notes that it will likely to be appealed to the Supreme Court of Puerto Rico. If the case prevails there as well, that would be the end of it. If it does not, it could be appealed to the US Supreme Court. He also notes that the case looks pretty good, with a good plaintiff.