I don't recall ever seeing a 1993 M Trax with suspension as an option, but I reckon if you'd asked they'd have specced an RS Quadra or an RS Mag 21 (?) or a PACE RC35. I always assumed the fact that their racing team, and some top end models, used front suspension meant the frames were at least nominally suspension corrected. Raleigh and especially the Special Products Division were among the best when it came to getting geometry right, and despite Raleigh's image of being about kids bikes or bikes for uncool adults, they were very forward looking when it came to this kind of thing.
In 95 or 96 I fitted an RS Q 21R to my M Trax 400 which had a lot of travel for an XC fork at the time, and didn't notice the geometry go funny.