Well...
If picked judges void the second amendment, what do you think is going to happen?
Let's stop there. The President or the Supreme Court cannot abolish the Second Amendment. Has anyone on the Trump side of the house scored better than a D- in basic Civics? To abolish the 2nd it will take the creation of a new Amendment, the 28th. I won't bore you with all that is required to do that.
Can a Liberal-sided Court interpret the Amendment in a way that allows states or the U.S. to ban the sale of certain types of weapons or magazine capacity, absolutely. But lets get the facts right and stop freighting people with lies.
It was NOT the court that banned assault weapons in 1994 but the U.S. House of Representatives and the Senate and Bill Clinton signing it into law. The Federal Assault Weapons Ban (AWB) — officially, the Public Safety and Recreational Firearms Use Protection Act — is a subsection of the Violent Crime Control and Law Enforcement Act of 1994, a United States federal law that included a prohibition on the manufacture for civilian use of certain semi-automatic weapons.
If you need to have a boogeyman to be afraid of, start with Republicans losing the control of both houses, and Trump is helping to get that done.