I presume you mean one of these:
I know someone who got that scope to mount on a FAMAS by drilling a hole into the carry handle, but honestly that scope just doesn't seem like it's worth the trouble.
As Bob suggested, get a FAMAS scope mount base, and then you'll have a rail to install whatever optics you choose.
Pic of real FAMAS with an aimpoint, doesn't look half bad IMO:
http://upload.wikimedia.org/wikipedi...e_2REI.jpg.jpg