That American liberals focus on rifles in regards to gun violence more than 1/20 as much as they do handguns or 1.75x as much as the president's recommended shotgun, nevermind the fervor for AWBs, betray the lack of concern and understanding of the issues truly driving America's culture of violence beyond "big ones are scarier".
All compounded by their laws' universal exemptions for police current and former, on-and-off-the-clock demonstrating no fear of arming the most violent among us as long as they swear fealty to minority oppression and dissident suppression in the name of maintaining capital's status quo, sleeping sound assuming those barrels won't turn inwards towards them. Hell, that the fight against gun violence now includes banning armor to protect oneself from it shows how important it is that we be obliged to let them indulge.
The body armor regulations are the real WTF for me. It's just a bold faced admission that they (i.e. the police and government) don't like the notion that maybe the police can't just roll up and kill you whenever they want.
The other reiteration I'll add to your point about police exemptions is (in case anyone missed the "former") that most of these bans and gun regulations not only exempt the police, they also exempt retired policemen. So if these guys are off the force, why do they need machine guns, switchblades, big magazines, > .50 caliber, etc., etc., etc., exactly?
It's the same reason the FAA has such stringent safety regulations for aircraft, while tens of thousands of people die in traffic accidents every year: Mass shootings are huge amounts of death and also rare, compared to crimes of passion or suicides by gun.
The problem is that to solve any of these problems will involve two things that Republicans hate: Providing social services and confiscating guns from people who shouldn't have them. Both of those are far less likely to pass than a simple ban on a small subset of guns.
So until Republicans put up or shut up about "it's mental health" nothing will get done.