We already have a minimum age for buying guns at 18/21. Lets raise it to 35.

We know it's constitutional to have a gun age limit of 21. So let's lever that to 35.

That would eliminate lots of school shootings by kids, not to mention that most gun crime is committed by folks under 35.

We could have some sort of procedure, where guns inherited or gifted to those under 35, go into a Trust which is released only upon age 35, or by order of the President for a national emergency (i.e. invasions, civil war etc)

This would honor the 2nd amendment and save lives.