It's been a while since I bought mine, about 15 years...

Mine is a FAS 604 and when I bought it they also had an identical to look at but heavier 604 as well. I got the lighter one so my son could also use it but I often use it when I can't be bothered to get the FWB out! Sorry I do not know any more details, what you said it probably right! (The standard grip is pretty good as well)