The way I understand it is the ATF made all owners of the Akins mail in the springs. They were allowed to keep the stocks. As long as there are no spring in it I think its okay.
40cal, you are correct. There is nothing constructive about posessing the stock. BATFE specifically identified the spring as the evil part. On that note, I doubt you will find anyone wanting to part with the stock as they are crossing their fingers that the Akins Group successfully sues BATFE for a reversal of that decision, which is in the works at this time.