The creator of the world's most popular 3D-printed gun has been unmasked as a former member of the German military who died in mysterious circumstances days after he was arrested. The designer of the FGC-9 (F*** Gun Control 9mm) is named as Jacob Duygu and pictured for the first time in a report published by the International Centre for the Study of Radicalisation (ICSR). Using the pseudonym "JStark1809", and wearing a distinctive black mask and sunglasses in online video appearances, he took care not to reveal details of his identity. But open source research by Rajan Basra, a senior research...