Since I have sold down quite a bit of my collection to fund the purchase of a M16, I have a couple DPMS A-15 stock extenions. These add one inch (1") of length to either a A1 or A2 stock. It is made of black anadised aluminum. Check dpmsinc.com under "stock". I have two of them. I paid $29.95 each plus shipping.
For a trade, I am looking for one new condition USGI 30 rd. mag. or two in fair condition finish. Must have all four tabs on the bottom and no dents to interfere with function.
Or $27 in a Postal Service M.O., I will ship to CONUS. Please let me know. Thanks for looking.