I'm considering ordering an 80% lower from Ares Armor. They actually have one that is already anodized, so no need for that. I would trust that if they're selling them, and advising on how to finish them, it's legal. I have not seen it mentioned here that you CANNOT transfer in any way. I saw someone mentioned selling it, but you also cannot GIVE or GIFT it. EVER. Also apparently, Ares Armor partners with a machine shop where you go there, clamp your lower in a CNC mill, and push the GO button. That counts as you doing it yourself.