Are you speaking as a licensee or just "shooting from the hip" with your comments?
SO... WRONG!
I have bought 80% and 30% lowers and they are mailed right to my door!
If an ffl was required that could not happen!
From one of the 80% dealers:
"Our 80% lowers and rifle kits are not considered to be firearms by the ATF. As such, you do not need to purchase them through a firearms dealer. "
"We provide a "paper weight" forging that can be finished to build an AR15 (style) lower receiver. The machining is approximately 80% complete. "
You CANNOT complete an 80% lower and sell them. ATF also
"recommends" if you complete an 80% lower you mark it uniquly so that if it is stolen it can be identified.
Quoted:
No, you cannot manufacture 80% lowers and sell them without an FFL. There is no If, Ands or Buts about it. You can't even give them away, and even leaving them to my kids in my will is questionable. Think along the same lines as to why most guys justify having a trust for their Class III stuff. Check out
CNC Guns for a lot more info. He has started selling some of his proprietary lowers (AR45) so if what you are interested in is selling because you have the ability to machine for yourself, then he has a great forum for those kinds of questions.