Quote Originally Posted by Circuits View Post
You can never ever make, build or buy firearms for the purpose of reselling them, unless you have the appropriate FFL. As long as you make, build or buy firearms for yourself, you can at any time later choose to sell them.

The gray legal area is not whether you're allowed to sell your firearms, or whether you built the receiver yourself or not as opposed to buying a commercial receiver upon which to build; but at what point your pattern of buying and reselling firearms requires you to get a license to do so.
The Supreme court just backed your statement up BIG time.