So when my bolt carrier breaks it's going to be a veritable quest to get a new one. So I was wondering, why can't they just be CNC duplicated? Is there some firearms parts duplication legality that I'm not finding? I found a company that CNC duplicates hard to find car parts and the like. You can send them a part and they will scan it into a CAD for a fee, then duplicate as many as you want. Surely I'm not the first person to think of this, so there must be a reason nobody's doing it???