3D-printed guns could become "the weapon of choice" for criminals and violent extremists around the world, an expert has told the BBC. These DIY, untraceable firearms have been recovered in several recent criminal cases, including the alleged use of a partially 3D-printed gun in the killing of United Healthcare CEO Brian Thompson.
BBC Trending has investigated the global spread of 3D-printed guns across social media platforms including Telegram, Facebook and Instagram, as well as websites offering how-to guides.
3D-printed guns, often described as a type of "ghost" gun, are untraceable firearms that can be assembled using a 3D printer, downloadable blueprints and some basic materials. Designed to evade gun-control laws, the technology has advanced rapidly in the last decade, with the latest models capable of firing multiple rounds without their plastic components breaking.
According to Nick Suplina of Everytown, a US-based gun control organisation, 3D-printed guns could become the "weapon of choice" for people planning acts of violence: "The materials have gotten better, the cost has gone down, and the ease of access of these blueprints is at a high," he said.
BBC Trending's investigation began with advertisements for guns on Instagram and Facebook. In October 2024, the Tech Transparency Project, a non-profit that monitors technology companies, found hundreds of gun ads - including for 3D-printed and other ghost guns - appearing on Meta's platforms, in violation of its policies.
