This is ridiculous that I even have to voice an opinion on this. If you are going to own a gun, or the means to build one, you should have to register and go through extensive background checks. Also, I can see no reason that doesn't involve some sort of illegal activity to have access to untraceable guns. I own guns and am appalled at how easy it is to walk into a gun store and walk out with a gun in less than half an hour. It's difficult not to wonder why a responsible gun owner with no I'll intentions would be against registrations and background checks. If you have nothing to hide, this shouldn't be an issue.