The first thing they are gong to have to do to write a law is to narrow the definition of an assault weapon. Webster defines it as any various automatic or semiautomatic firearm. This means that some automatic or semiautomatic firearms are and are not within the definition.
Furthermore, congress can regulate firearms through its commerce and taxing powers—powers enumerated in the US Constitution. The principal powers available to Congress to regulate firearms are the “commerce power,” arising from the Commerce Clause, and the “taxing power,” arising from the Taxing and Spending Clause. But there is no law that says the federal government can remove firearms based upon their determinations. They can make them expensive through taxation, but it is not in the powers of the Constitution to remove or regulate based upon type of firearm especially when the final determination is states’ rights.
wy69
Fully semi-automatic needs to be added for clarification.