https://www.techdirt.com/articles/20180801/01105040342/ignorant-hysteria-over-3d-printed-guns-leads-to-courts-ignoring-first-amendment.shtml

A year and a half ago, we wrote about a troubling ruling by the 5th Circuit siding with the US State Department waving a magic "national security" wand to ignore the First Amendment implications of banning the internet distribution of the CAD files for 3D printing components for guns. As we pointed out over five years ago, the hysteria over these 3D printed gun plans was silly. Attempts to ban them from the internet wouldn't just fail, but would actually draw much more attention to them.

However, in the last few days the hysteria has returned... and much of it is misleading and wrong, and while most people probably want to talk about the 2nd Amendment implications of all of this, it's the 1st Amendment implications that are a bigger deal. First off, most of what you've probably heard about the case is either wrong or misleading. David French has a pretty good post separating fact from fiction. This is not (as some claimed) the Trump administration "legalizing" 3D printed guns. It is already legal to make guns yourself, so long as they are not undetectable. Undetectable guns are already illegal under the Undetectable Firearms Act of 1988 and nothing has changed or is changing on that front.