On June 26, 2026, the Civil Police of Rio de Janeiro, through its specialized firearms, ammunition, and explosives unit, raided a clandestine workshop in Rio das Pedras, on the city’s west side. Investigators said the group used a 3D printer seized at the scene to produce pistol frames and structural rifle parts in polymer and then completed them with metal parts. Early reports described those parts as imported, but police said on the day of the raid that they were still determining the metal’s origin. Police described the operation’s main target as an international arms and ammunition trafficker who supplied The post Inside Brazil’s 3D-Printed Gun Supply Chain appeared first on War on the Rocks .