Bingolong, before you

me, please understand that when I posted
"The idea that short barreled shotguns (including pistol length; google Lemat revolver) are NOT historic US military weapons is laughable. "
that means I find the US V Miller SCOTUS decision an incorrect ruling that is so wrong in so many ways I can only laugh at its absurdity.
Arlo, the 1897 Trench guns had "legal" barrels of over 18". Most were 20" but some were 18's. I have an 1897 riot gun with an 18"; used by the Federal Reserve until about 1970 and then sold off as surplus for $10. My dad should've bought ten of them. Anyway, the WW1 trench guns would not have been covered by the NFA. I'm sure Bingolong will be quick to point that out.
The entire militia aspect of the 2nd is misunderstood by those who don't think the 2nd is an individual right. A little study into the writings of the Founders and into the actual history of the amendment should be enough to set the SC on a course to settle this once and for all as an individual right.