Here's how this works in certain areas:
If everyone owns a gun, knows that it's a common thing in the town/neighborhood?
Gun violence/gun related incidents go sharply down.
Where the most restrictions are that prohibit gun use, that's where the gun violence goes up.
Virginia tech shootings: guy was patience to wait 7 days, 14 days, 30 days.
If someone wants to kill someone, it's going to happen. Pick your weapon of choice. Gun isn't always the logical answer for some but you can line up all the dead bodies from head to toe...won't ever stop violence.