After the release of two 3D-printable firearms was met by warnings from lawmakers, Philadelphia has become the first US city to ban 3D-printed guns. The Philadelphia city council voted unanimously to pass a bill banning the practice on Thursday, reports Philly Magazine. councilman Kenyatta Johnsons director of legislation told the magazine that its based on internet stuff out there. Philadelphias response to this new flavor of firearms manufacturing isnt surprising; According to FBI crime statistics, Philly reported 331 murders in 2012, ranking it among the most violent cities in the US.