I don't think this court is inclined to allow anything to be added to the NFA, certainly not anything in common use. Their nysrpa v bruen ruling is counter to both the NFA and the GCA. I don't have high hopes of either being repealed by the courts, but at the same time I lean towards this court saying no further encroachment under either.So? The ATF didn't regulate stun guns, but the State of Massachusetts did. And SCOTUS says in Caetano that stun guns are arms and in common use therefore Massachusetts cannot prohibit them. In the same vein, States could in theory try to prohibit things like knives and bladed weapons of certain lengths and styles, but 2A says they're arms if the ATF have admitted that AR15s are common use, then they may have opened themselves to a suit that could set a precedence that common use /common configured firearms cannot be blanket-banned (as California and others did); but could still leave them to be regulated similarly to NFA firearms.