Thankfully the justices on the right side appear to be in good health. What can happen to them in the course of a day is open to conjecture. At the Federal level gun bans are not going to happen unless the Democrats gain all three branches of government. After having Obama in the WH and the mess we have, I don’t expect to see the Democrats reign over the populous in my lifetime.
The law in question is only functional in states not having a strong RTBA (Right To Bear Arms) in the State Constitution. 40 states have a RTBA; https://www.guntrustlawyer.com/2008/06/39-states-have-constitutional.html