The recent Las Vegas tragedy will once again bring out cries for gun control and demand for new laws.
As a gun owner and 2nd Amendment advocate, here is an alternative suggestion:
Pressure your Senators and Congressman to PUBLICLY demand enforcement of the existing 1939 Federal Firearms Act (controls automatic weapons) and the 1986 Firearms Owners Protection Act (makes ownership of automatic weapons illegal). This would be much easier than trying to pass new laws with 60 Senators, 268 Congressmen, and vicious battles with lobbyists.
It would probably be possible to prosecute the selling of conversion kits and dissemination of conversion literature as acts of a conspiracy to violate these laws.
We do not need new laws trying to circumvent the 2nd Amendment to battle the problem of fully automatic weapons. We only need to actively enforce the laws we already have on the books.