Ya not broken just wondering if it broke. And yes those 80% lowers where it's nothing at all!
Why is that you can't replace something that used to exist? What law would I be breaking if I did that? I'm curious.
Yeah say if someone accidentally ran the rifle over bending the lower...
You would be building a "new" SBR technically. "I had one just like it" isn't a free "I can replace it without doing anything" license. It really is no different than if your SBR was stolen and then you built a new one and didn't complete any paperwork in the eyes of the ATF.