NFL stuff is actually a pretty good example of largely pointless law considering that what it does is effectively just make the items in question more expensive

NFL stuff is actually a pretty good example of largely pointless law considering that what it does is effectively just make the items in question more expensive by taxing them and artificially limiting supply. If you want to own a machine gun, a grenade launcher, or even a fully functional tank in US, you still can so long as you're rich enough to afford it (unless your state has laws banning it). There are no additional restrictions on who can and cannot own that stuff beyond the requirement to pay the tax.