I would like to eliminate the phrase "school shooter" and replace it with "mass murderer at a school." Add the word "attempted" when no-one dies. Words have power.
Amending the Second Amendment would take overwhelming public support
Amending the Constitution is intentionally difficult, requiring 2/3rds of the House and Senate to pass an amendment and ¾ of the states to ratify it. Amending the Second Amendment would require an overwhelming supermajority of Americans and a tectonic shift in public opinion about guns.