Prove it? They are all law in various states and countries with zero to negative correlation. Gun control and crime, to include mass shooting does not have any statistical correlation that is actually mathematically valid which is why grabber groups stray so far from the scientific method for their "studies" and rely so heavily on emotion.
They deliberately encourage them. This is a known and proven fact.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0117259
You aren't arguing, you're just claiming you're right and pretending that because of that you don't need to justify shit. I can go in depth on any of these. The onus is on you to actually suggest a difference rather than falsely assuming your position is already secured.
Magazine bans for example overwhelmingly hinder defensive uses over offensive ones. Anyone that played the original Call of Duty Modern Warfare was taught this in the tutorial when they yelled "SWITCH TO YOUR PISTOL, IT'S FASTER THAN RELOADING." An empty magazine is simply a "failure to fire drill" and is treated as such. You retreat to cover and clear the weapon. It is only an issue if you are cornered and alone. For an attacker, the easiest way to mitigate it is to bring multiple weapons, which high body count shooters do. When you are the attacker you get to select the time and place of the attack as well as set the pace of each encounter. When I go to a movie theater to watch a movie, I have a single pistol on me because carrying multiple guns isn't practically feasible day to day. If I was told that on a specific day at a specific time and specific place I would be a in a shootout, you can bet your ass I would have multiple guns and screw concealment; this is exactly what cable news shooters do. At Virginia Tech he fired 170 rounds from 17 magazines. Many of them held more than 10 rounds but he never needed to reload under duress because he chose his own pace from room to room with opportune reloads in between. The only person that is functionally limited by a magazine capacity restriction is the person that did not choose to be in a shootout at that point in time and does not have control over the location and pacing of the fight.
I can do this for virtually every single proposal you have. I can also give counter proposals that can actually address some of the concerns like with UBCs but nothing I say is new. It has all been proposed before but rejected by the Democrats for not going too far enough. They don't want to solve the problem or stop shootings; they want to ban guns. Gun control has and will always be about control.