A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.I don't see any restrictions based on prohibited persons, type of firearm, 80% receivers, etc. We're already a long way down the road toward totalitarianism.
The prohibited person is a felon. You lose your 2nd amendments rights when you are a convicted criminal.
Making a firearm for yourself is perfectly fine, no serial numbers needed.
He was manufacturing and selling firearms without a license.
these aren’t new laws. You are free to break the law and suffer the consequences, or change the law.
BTW, I have a type 7 FFL and I have to obey the law.