You wrote “It is not a radical idea to think that people on the no-fly list, with violent criminal backgrounds, or with a severe mental illness shouldn’t be able to purchase a firearm.” No-Fly list is illegal punishment without even a hearing no less a conviction. About Violent Criminals and Severely Mentally Ill, they are already prohibited from owning firearms (can’t even legally have them certainly not supposed to be able to buy them) if they have been convicted of a felony or adjudicated by a judge as incompetent. No new laws need except to repeal the No-Fly List.
We do not need more laws. We are way past “common sense” gun laws. All the “common sense” measures are already on the books and some stupid laws as well. Magazine capacity restrictions are pretty high up there on the nonsense scale.