—”Wow. I mean, making a functional mortar just is not that hard.”
But it does require standard dimensions of all components... like the OD of the fins centered on the firing pin and overall OD so the round drops smoothly down the tube.
That said some of the rounds do fire, an extended hangfire of the dud round on the pile might scare the crew away. for a very long time.
Yes, but it's really not that hard to do. Won't give details because I don't want to teach some crazy lurker how to do it.
PS I have a couple engineering degrees and a lot of experience, so maybe my perspective is a little different.