I have for sale an excellent condition Magpul CTR - Stock Only - Sized for the MIL-SPEC receiver tube. Stock does not have the rubber pad, but does have the cap that covers the stock end over the tube.
$75.00 OBO Shipped USPS Insured.
I also have a standard A2 Pistol grip for sale. Just Grip - nothing else. Grip never really used much - always had this one around as an extra.
Pay-Pal or USPS Money Order. I have Positive Feedback here.