I just build my first 80% LR 308 lower. What I want to know is anyone putting a personal serial number on theirs or some other kind of marking or are you just leaving it completely blank? I know currently you're not required with the 80%ers, but I'm worried if it ever was to be stolen, being able to say that was my rifle if it was recovered and being able to prove it. Anyways...just wanted to know what everyone else was doing.