Just found this today and am very very happy! It's a Diaclone/Diacron/Kronoform Multi-Force 14 ko. It's a fave mold and the pic can be seen over at Tfans: http://www.tfans.com/talk/index.php?showtopic=44673
Got the Grandstand Convertors version of him (sans a chest missile). Great toy, and a favourite of mine.