I don't know how many remember the guy the started putting gun plans out on the net 3-4 years ago only to be blindsided by the Obama administration. It was finally settled in favor of free speech and gun rights via settlement in favor of the plaintiff. They also admitted..."the government expressly acknowledges that non-automatic firearms up to .50-caliber — including modern semi-auto sporting rifles such as the popular AR-15 and similar firearms — are not inherently military,"
https://www.pcmag.com/news/362382/3d-printed-gun-files-can-be-shared-without-legal-penalty
https://www.pcmag.com/news/362382/3d-printed-gun-files-can-be-shared-without-legal-penalty