The additional problem that if one "makes" a SBR, then one has to comply with the laws in place at the time. If a new version of the old AWB is passed into law, then even "pre-ban" rifles that are "made" into SBRs would have to comply with the current law. That means that a pre-ban rifle made into an SBR after the ban went into effect would have to be ban compliant. That is how it worked during the 1994-2004 ban, so if the same law were passed again, the situation would be the same.