Its a badass idea in theory for sure. I dont even understand it quite honestly. But i read that the company who designed these printers will only be allowing government to have its hands on it. So really its worse then the thing never being invented at all.
Just remember how stuff works when SHTF. All the stuff "the government" has, usually ends up in the hands of the people one way or another, same thing with a resistance.
Not to mention, in a resistance, there is a need for a cheap "one shot" .22LR silenced weapon. The current technology for that is 100 percent available.
Think outside the box. Once a technology is CREATED, it is hard to make that knowledge disappear, you could probably make one of these for much cheaper than buying one. If you wanted one bad enough, you could create it yourself, on the downlow. It just goes to show, how silly gun control is, especially outlawing all guns in private hands.
You should see some of the firearms resistances have made in their garage, when firearms were illegal, and I guess they couldn't do any tactical requisitioning from regime stock.