Yup, the law is essentially spaghetti code at this point and extremely complex based on Federal and individual state rulings. However, the specific idea of 'original intent', or any kind of Constitutional Originalism, warrants a heavy dose of skepticism for a technology class that has changed in 200+ years.

The Founders didn't have the same kind of firearm technology available in 1789 as is now available. There is the ongoing, constant mass shooting issue that would be impossible to pull off with a musket or rifle. That puts a lot of pressure on lower courts to interpret existing laws within the context of precedent, but without the context of recent historicity that is very important to this specific topic.