?? Double Star CAR Stock??

A local shop has Double Star CAR Stocks but I didn’t have an opportunity to ask about it so maybe somebody here can answer my questions:

  • Is it a MIL Spec Buffer tube?
  • How many positions on the tube?
  • What should I be paying for it retail?

TIA

The only one I have seen was a six position, price tag was 85 (from a well known dealer), unknown on spec but if I had t guess it would be commercial not sure though.

I have a DSC stock and the buffer tube is commercial.

Thank you both