An Australian Senate panel began looking into the possibility that 3D-printed guns may complicate gun-control efforts. The country’s restrictive gun laws do not currently include specific language regarding 3D-printed guns, which concern lawmakers and law enforcement because of their fairly broad and easy accessibility, the relatively low-cost of producing them, and the difficulty of detecting them with conventional equipment like scanners and X-rays. More details on this story can be found here: http://3dprint.com/18944/australia-senate-3d-print-guns

Below is just one example of a 3D printable gun: