Impressive 3d printed gun
https://homemadeguns.files.wordpress...2-v4.png?w=624
3d printer plans are available to create the gun itself, plus the mags (glock compatible mags).
Even the barrel is home made, using hardened steel tubing, and a DIY version of electrochemical machining for the rifling.
https://homemadeguns.wordpress.com/t...nce-dispensed/
Details about the rifling are in this article:
https://www.thefirearmblog.com/blog/...d-electricity-
ecm/
A twitter feed with a bunch of vids as well.
https://twitter.com/Ivan_Is_Back/status/1224430607473807360
edit: digging around, I guess this is at least a couple months old. I think the official cad files were released today.
Here's another page showing an earlier version of the barrel rifling process
https://imgur.com/a/diHx7#m54fVz4