shooter bullied over poverty, appearance, clothing, called gay slurs, was aggressive towards women

[Sancho]

51. Having a strict license to have access to guns and ammunition does not preclude restrictions on guns

If there are bans on types of guns that is fine, but it's a different issue. Lots of states have legal permits. I just believe that a very strict permitting/license process would prevent many dangerous people from access to guns of any type.

If there are gun bans, restrictions on various loading magazines, or banned types of bullets; that's fine with me too.

My guess is that if you had a strict license that required training and insurance, even a "legal" possession of a mortar or bazooka would be very costly and difficulty. To use your example...to buy a mortar shell you'd have to produce a current license that authorized you to possess mortar shells. You would have to obtain that license with serious training and pay for a pretty expensive insurance policy. You would need references that you were safe to possess a mortar. You get the idea.