In 2013, Department of Justice hit Defense Distributed with ITAR for posting 3D printed gun design. Second Amendment Foundation fought with Defense Distributed and announced they reached a settlement.
-DOJ acknowledges that non-automatic firearms up to .50 cal are not inherently militaristic in nature.
-Export of technical information is regulated by the Commerce Department
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http://www.shootingwire.com/story/3039c9b1-6afd-4899-87c2-36d74f4609c4
From: The Shooting Wire