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. The bill is presumably a response to the birth of weapons like the Lulz Liberator pistol; councilman Kenyatta Johnson's director of legislation told the magazine that it's based on "internet stuff out there." Philadelphia's response to this new flavor of firearms manufacturing isn't surprising; According to FBI crime statistics, Philly reported 331 murders in 2012, ranking it among the most violent cities in the US.