Has anyone successfully completed an 80% frame build? Where can I find them for purchase?

[PatriotDefender]

3D printing may be cutting edge, but traditional craftsmanship has its own allure. Different strokes for different folks.

[LongRangeLover]

So, does anyone else think building an 80% frame should be regulated like firearms? I mean, its a gray area in terms of legality and safety. Maybe its time for stricter rules. Just a thought...

[AR15Fan]

Is it just me, or does anyone else think that building an 80% frame is a risky move? Sure, its cool and all, but what about the potential legal issues down the line? Just a thought.