Are they in common use? Remember, 300 million citizens. Scalia is counting.
The U.S. Supreme Court will probably go along with the popular ones. But the high-powered, "assault sniper" rifles are way too dangerous, they're not that common, and they gotta go. Sorry.
The quality of your discourse has plummeted recently. If you want to know how many rifles there are in the country, sneak into the woods in Pennsylvania wearing camo on the first day of hunting season. Wear some antlers on your hat.
I probably own a dozen rifles myself. Three of them are M1 Garand World War II battle rifles sold to me by the US government. I have read an estimate that there are 80 million gun owners in the nation and 280 million guns. How many do you think are rifles? Half? Probably.