With public submissions on the Arms Act closing this month, Professor Al Gillespie says we need to consider the threat of 'ghost guns'
He says computer-aided manufacture, of which 3D-printing technology is the best-known form, enables manufacture without traditional gunsmithing skills.
Al Gillespie joins Emile Donovan to explain why he thinks it’s an issue we can’t ignore.
Photo: ABC News: Michael Nudl
