[friend_and_foe]

Even under more restrictive interpretations that were prevalent in times past, Puerto Rico doesn't qualify. Their gun laws are very similar to other Latin American countries. They require you to have a reason to get a gun, and a "may issue" policy which means they can just say no with no justification required. They don't often say yes, so de facto gun ownership in Puerto Rico is banned, the only people that get them are the politically connected and people who grease palms.