the ATF's rules are awesome because you can use their retarded rules against them and comply maliciously. they has been flooding poor urban areas with glock switches that turn any $300 glock into an unregistered machine gun by just refusing to enforce "intent to manufacture", so there's probably more glock switches in bulk shipments from china than there are legally registered machine guns in the entire country... so it's really too bad that super safeties are for all intents and purposes a machine gun but cannot be machine guns according to how the law is written. the poor black people get the stuff that's illegal and doesn't work right delivered to them by the government, meanwhile white people get the engineered and fancy stuff that isn't considered illegal.
my favorite is how it's completely and totally illegal to own an SBR without a tax stamp, but the supreme court ruled it's okay to put a brace on a pistol, so you can just buy a short barreled ar-15 pistol and put a brace on it and since it's legally not a rifle you can put vertical grips on it too. it's a win-win, you get to do what you want and the government gets to feel like they're doing something.