well thats dumb. So just like I edited, I personally should be fine since I had them already engraved with a serial when I bought the 80%s. Means the manufacturer did it. But had I laying around an unserialized 80% that would then be illegal? correct? Not saying to break the law or show intend but how they know if something was serialized by the 80% mfg or at home??? And if I'd need an FFL for an 80% why would I bother and not just get a 100%? less work lol