Impro Guns has an update on the most common 3D Printed Guns seen in the wild. Seen by law enforcement, anyway.
The two most regularly encountered 3D printed firearm models currently being seized worldwide, the FGC-9 MK2 and Patrick Songbird .22lr
A couple of great photos aside from the main photo at the top of the article.
Here is an unrelated photo of the FGC-9