An almost fully 3D printed firearm was test recently in a third world country (firing pin and striker spring were not printed).
4 shots of 22lr were fired the fourth cartridge melded with the plastic barrel.
There isn’t currently any source for this, but I’m hoping that a full analysis will be published soon.
I’ll link you to it when that happens.
“This was a project with a political goal. Yes we know that there are things like C&C milling and there are gun files already online, but the idea was to take a technology, celebrated by these people-power, mostly skewed liberals, ‘Oh it’s the new revolution in manufacturing!’ Take their precious technology, make guns with it, and show them, yes, it is revolutionary, and in fact that has more meaning than you think it means.”