What America would look like if it didn't change their Amendments

[jimmy the one]

29. had jack miller lived

aiko x2: What do you think would have happened had Miller lived And showed that short-barreled shotguns were used and useful in WWI fighting in the trenches?

If Miller had lived, he wouldn't have appeared in court to say anything like you suggest (laughable aiko), because he had ratted on his pals & they would've killed him once they realized where they could find him (DC):

wiki: In reality, {first ruling by district court, in favor of jack miller} was in favor of the gun control law and {only} ruled the law unconstitutional because he knew that Miller, who was a known bank robber and had just testified against the rest of his gang in court, would have to go into hiding as soon as he was released. He knew that Miller would not pay a lawyer to argue the case at the Supreme Court and would simply disappear. Therefore, the government's appeal to the Supreme Court would be a sure win because Miller and his attorney would not even be present at the argument

Neither the defendants {miller or layton} nor their legal counsel appeared at the Supreme Court. A lack of financial support and procedural irregularities prevented counsel from traveling. Miller was found shot to death in April, 1939 before the decision was rendered
https://en.wikipedia.org/wiki/United_States_v._Miller

aiko: short-barreled shotguns were used and useful in WWI fighting in the trenches

Maybe then, but that was a standing army under pershing, not a local yokel crossing state lines not acting within a well regulated militia.

Aside: Germans, somewhat surprisingly, appealed to the hague convention (or geneva, later i thinks, can't recall) to disallow short barrel shotguns in early stages of WWI due their horrendous way of killing, near cutting a man in half sometimes at the belly, leaving him still alive for a while (up to days possible since stomach wounds can be like that without much blood loss). Pershing arrived 1917 iirc, so issue was likely past by then, and not adopted.
You approve of sawed off shotguns aiko? wakaru masen shiite