The gunfight in Waco, Texas that killed 9 and ended up with 200 arrested is described by a local law officer as merely "one of the worst" gunfights in the area. There you go. Not even the local record.
Way to go, America.
I believe the right to bear arms was brought in, in case British militias attacked. But it's been 240 years now and we've not attacked for ages. If we promise to stay this side of the pond, do y'all want to put your toys away and stop killing each other?