I dont remember a RAPTAR specific rail, however the screw that goes through the body of the unit and into the mount is a STANAG 4694 compatible bolt. If I remember right, there were some rails with holes in them where this screw/bolt would thread into directly negating the need for the actual mount as you could hard mount it to the rail.
I also vaguely remember some sort of rail that had a section towards the front for a PEQ15 to sit lower but can't remember what it was.