From Ars Technica:

In a 2-1 decision, the 5th Circuit Court of Appeals was not persuaded that Defense Distributed’s right to free speech under the First Amendment outweighs national security concerns.

Ordinarily, of course, the protection of constitutional rights would be the highest public interest at issue in a case. That is not necessarily true here, however, because the State Department has asserted a very strong public interest in national defense and national security. Indeed, the State Department’s stated interest in preventing foreign nationals—including all manner of enemies of this country—from obtaining technical data on how to produce weapons and weapon parts is not merely tangentially related to national defense and national security; it lies squarely within that interest.