The 7 states with the most restrictive gun laws are all in the top 11 of most mass shootings since 1982. A mass shooting is defined as 4 or more people killed.
We have 40 years of data to show that preventing law-abiding citizens from carrying a legal firearm is not the answer.
Instead, we should be profiling potential buyers of firearms by the characteristics of the vast majority of school shooters. Profiling doesn't mean that they can't buy firearms; profiling means that they would be subject to a higher level of scrutiny before being allowed to buy firearms and the type of firearms would also be restricted. Specifically, the majority of school shooters are 1) Age 25 or under (over 90% of school shooters are 25 or younger) 2) On or previously on antidepressants... about 90% in one study I saw a few years ago, or 3) From a single parent household.
As a lifetime HCP permit holder, I'd support a bill restricting the gun ownership rights of individuals meeting even one of those criteria. Specifically...
I'd support limiting firearm sales to individuals age 25 and under to bolt action rifles, 4-round pump shotguns, and revolvers with no more than 6 rounds. No semiauto rifles or handguns could be owned because their capacity can be easily increased by adding high capacity magazines.
I'd support a bill requiring anyone under 25 with a history of taking antidepressants to pass psychological testing to buy a firearm.
I'd support a bill preventing a person under age 25 from a single parent household from buying a firearm from an individual. They could only buy from a gun store after a 90 day waiting period. They could only buy a bolt action rifle, a 4-round shotgun, or revolver.