These high profile mass shootings are a VERY small percentage of violent gun crime. 94% of gun crime is done with an illegally obtained weapon (What Percentage Of Crimes Committed With Illegal And Legal Guns - Gun Laws ).
Are crimes with a legally obtained ‘assault’ weapon a problem? You bet, but it is a VERY small problem when you look at the big picture. I am all for reducing gun violence, but instead of removing rights from the common law abiding citizen in the name of cutting down on small percentage of the crime lets go for the big problem, crime itself. I believe that we’d see a greater reduction in gun violence if we abandoned the drug war, reformed our punishment system (a college kid selling dope does more time than a lunatic who ran someone down in a vehicle), reform our court system (why are murderers allowed to plead guilty to get a manslaughter charge, letting them back out into the world in 15-30 years), and handling our mentally ill better.
I would give every penny I have, make, and would make in the future to see you or someone with that view ACTUALLY PUT THAT INTO PLAY. Without a doubt what you just said in 30 seconds, if that was actually put into place in this country, would make a real difference.