If there aren’t fewer deaths, what does it matter?
This is where so many miss the point. The goal is not a reduction in gun deaths, it’s a reduction in all violence-related deaths.
Mass shootings are not a simple problem. If they were, perhaps a simple solution would have made itself evident by now.
Columbine is a favorite example. Eric Harris and Dylan Klebold never planned to shoot up Columbine High School. Their plan, developed over the course of a year, was to use propane bombs to collapse the roof over the cafeteria during the lunch period. The guns were to be used to shoot people trying to escape. Had they succeeded, the death toll would have been far higher.
In 2014, Mark Glaze, former director of Everytown for Gun Safety and Mayors Against Illegal Guns told the Wall Street Journal that none of the measures the groups were promoting would have stopped any of the mass shootings. Since the measures currently on the table are generally the same as they were then (not to mention the same as they had been for years), there is no reason to expect they would be any more effective now. Einstein may not have said that insanity is doing the same thing over and over and expecting a different result, but it is true nonetheless.
You wish to frame the discussion in a certain way. Since your parameters do not meet the requirements of the issue, I have chosen to take it to the larger arena that more aptly defines the problem in the proper context.