Here's one I get a lot of flack for that I don't bring up much
I think people trying to cook up gun control laws are targeting the wrong guns, in going after semi auto or military rifles, when they should be going after cheap handguns that have been available forever. The majority of gun deaths are suicides, and that's almost always done with a hand gun, but even if you control for that the majority of homicides with guns are done with hand guns.
Hand guns are usually relatively cheap. They are very easy to conceal. Its very common for people to walk into a bar with a holstered hand gun and make a series of bad decisions. Its too common for people to get in road rage incidents that escalate into something tragic because of a handgun in the glove box. People leave them around their house and treat them as toys that kids end up finding.
AND I would argue that handguns are not in the spirit of the 2nd amendment. They are not fighting weapons. They are for fun, personal protection, or making people feel tough without having to do any real work. They have little range and lesser power. There are are no troops in the world that deploy with handguns as a primary weapon. US military officers get them but that's more about tradition.
Yes, I'm aware that shooting incidents done with rifles would be more deadly, but the fact there would be much fewer of them at all would be a net benefit in a society that banned or severely restricted hand guns.
I think all sports aren't equal in this. The rules for MMA would surely be different than the rules for curling or chess. The people who control sports organizations usually have a life dedicated to their sport, and are in a much better place to make a call about it than congress or randos on the internet. This matter should be handled by them. The fact that anyone without skin in the game cares about this at all is a losing battle.