The gun grabbers always hold on to the belief if they can just ban this one gun-related item, they'll stop all future mass shootings/killings.
The unfortunate fact is unless they ban cars, gasoline, knives, clubs, etc., they will not stop mass killings.
As have been proved numerous times in the last five years, there's virtually nothing stopping a nut from getting in a motor vehicle and running down numerous people. They just have to wait their chance, and the chance will occur.
The trick is to put them away (if possible) before they can do harm, and to be armed to defend against them if possible.