And indeed, it's when you mention the fact that UBCs require a gun registry to be enforceable that people really start opposing them. (The current background ch

And indeed, it's when you mention the fact that UBCs require a gun registry to be enforceable that people really start opposing them. (The current background check system was passed with the compromise that it wouldn't be used to make a gun registry though the ATF, and in fact the ATF was not allowed to digitize records for exactly this reason. The ATF appears to have begun ignoring this deal in recent years, though)