Rather a stretch? hysteria?
Take a look around at what the Dear liar has done in violating the rule of law with Obamacare, illegal amnesty, etc.
Clearly the man will push the boundaries (literally and figuratively) as far as he can go.
If they can construe the law to apply to that type of ammo as being Armor piecing whats to stop them from arbitrarily applying that to any type of ammo?
Like most Statists, Obama hates that people have certain common sense civil rights, and if he cant be rid of them by the legislative process he will do it by executive fiat.
Remember: the "armor piercing" designation has a very precise, if misguided, definition in law. It has nothing to do with ability to pierce armor - and it's exactly that legal definition which DOES stop them from arbitrarily applying "that" to any type of ammo.