I saw this over on another message board. Apparently Kel-Tec is going to release a version of the SU-16C with the Alpha style stock.
http://www.kel-tec.com/news.htm
http://calguns.net/eve/ubb.x?a=tpc&s=888602736&f=332609466&m=79910538121
http://www.kel-tec.com/news.htm
http://calguns.net/eve/ubb.x?a=tpc&s=888602736&f=332609466&m=79910538121