https://www.theguardian.com/technology/2018/jul/31/seattle-judge-blocks-release-of-blueprints-for-3d-printed-guns

Order puts hold on plan to make blueprints downloadable to print untraceable and undetectable plastic guns

A federal judge in Seattle has issued a temporary restraining order to stop the release of blueprints to make untraceable and undetectable 3D-printed plastic guns.