Fine, then ATF Class 3 licenses, which are required to keep and bear some kinds of arms, are a breach of the 2A similar to how the 1A is being breached here.
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.
