Yes, it's time and past time. Ban the 1990 Chevrolet Caprice!
(No, that picture is not the snipers' car.)
Sound silly? You betcher ass. Of course the car isn't responsible for the use to which it was put. Neither is the Bushmaster AR-15 rifle that was used, but I'll be astonished if we don't see a push for another, more inclusive ugly gun ban like the one that was committed in 1994...which will likely ban the AR-15 in any form, but leave untouched the Ruger Mini-14, which is functionally identical, but uses different styling (and different magazines, but still 10 rounds each).