Sure, especially considering they said fully printed -- no pre-made firearm components.
The FP-45 Liberator pistol and the CIA's Deer Gun are "real" guns designed for that exact purpose: to kill someone at close range to steal their gun. The first "successful" 3d printed gun was the Defense Distributed Liberator, followed by a plethora of single shot "zip guns" of the same type.
So ... a bunch of 3d printed guns specifically copied from the concept of the FP-45 and Deer Gun.