I've been doing a lot of research into what I need and how to build my first ar-10/lr 308. I know under federal law a 80 lower isn't a firearm and you don't need to serialize a lower, but while I was checking the laws in Oregon. I saw SB 978 and what some it said (If you've made a firearm out of an “80%” lower there is no provision for adding a serial number yourself. The possession of any of these finished guns will be a felony. If you currently possess any 80% lowers each one is a Class C felony.) Which isn't very helpful and I'm hoping that someone can help me with this.