320 Million Plus Americans (as many or More Legally Owned Guns)
10 Thousand 'Gun Homicides' (this Includes Criminals Justifiably Shot in the Commission of a Crime
and Since you specifically cited School Shootings,
We are 1 year removed from the 'Stoneman Douglas' Shooting... Had any any ONE of a multitude of Existing Laws been Followed by the Authorities, the Shooter would neither have had access to his Guns, Nor been allowed on Campus...