Earlier quoted context omitted.
This is so silly. If the country ever comes to the point where only you and your 3D printed gun stand between freedom and the government's tyranny, you'll just be obliterated by a Predator drone. Advances in and proliferation of 3D guns will only endanger innocent citizens. Thinking that it's any kind of check on government power is a childish fantasy.
You really ought to read about the namesake of this gun: http://en.wikipedia.org/wiki/FP-45_Liberator If it comes to that, it's merely a tool to get better guns.
"General Eisenhower's staff never saw the practicality". And I don't either.