From Policy Forum:

In 2015 New South Wales amended its laws to outlaw the possession of digital blueprints for firearms and strengthen existing laws prohibiting the manufacture of weapons.

Since 2015 Australian police have made a handful of seizures of 3D-printed firearms. A loaded 3D-printed handgun was seized by Queensland police in a raid on a methamphetamine lab allegedly associated with the Lone Wolf Outlaw Motorcycle Gang (OMCG). In December 2016, Victorian police seized a 3D printer, firearms, and drugs from properties raided in Melbourne. Cases have also been reported in Japan, the UK and the US where 3D-printed AR-15 rifles were used in two murder sprees reported in California.