Correct, and IIRC, the fact that Miller didn't show up to his appeal, and his attorney did him no favors, it was ruled that a sawed-off shotgun was not a military weapon, thus not protected under the 2nd Amendment. The reality of it is, sawed-off shotguns were used regularly in WWI, and had either Miller or his attorney bothered to show this, the Miller decision would have gone the other way.
Miller’s original attorney didn’t show up either. Further Miller argued against the constitutionlaity of the 1934 gun control act which specifically infringed upon the very firearms which the ruling claimed the 2nd amendment protected. It was a travesty.