As pointed out in the quote included in Post #26, the Supreme Court in Miller made no decision regarding the short-barreled shotgun and, in fact, remanded the case back to the District Court for future proceedings. Unfortunately, neither of the parties, Miller nor Layton, was available to pursue the case.
The clear implication was that, if the shotgun was useful to a Militia, then its possession by Miller would have been protected by the Second Amendment. This is totally opposite to this terrible decision.
Yes, that’s it. A bad decision.