Jacob Duygu

Jacob Duygu
Bornc. 1993
Germany
DiedOctober, 2021
Völklingen, Saarland, Germany
Other namesJStark1809
OccupationsFirearms designer, former soldier
Known forCreator of the FGC-9 3D-printed firearm

Jacob Duygu (c. 1993 – October 2021), known online as JStark1809, was a German firearms designer and former Bundeswehr soldier. He is best known for designing the FGC-9, a semi-automatic 9mm carbine that can be manufactured using a 3D printer and widely available parts.