I think it shows just how unreasonable the anti-gunners can be that they would use weapons export regulations against the sharing of 3d printed gun designs.
If I were in the Pentagon or Homeland Security (theatre) I would ENCOURAGE the export of 3d printed gun designs. Let the enemy blow their own hands and faces off with their plastic guns! Hell, let domestic criminals do the same!
Meanwhile law abiding gun users can just buy them or make them on lathes. Personally I may just try to 3d print a gun some day just to say I did but the only way I am firing it is with a long string tied to the trigger and myself ducked down in a ditch or behind a good strong barrier.
Plastic guns! They make the bogey man sound like a reasonable fear!