Just thought I’d share this:
I saw this in Jasper’s (“Kampfer”) stash of parts and accessories that he brought to work to one day… its relatively old school; I’m pretty sure you can’t buy these anymore.
Tanio Koba under mount for M92F clamps onto trigger guard, hugs the M9 dust cover. Laser or flashlight of appropriate size slides into mount and is fixed into place via grub screws. Looks simple enough to attach non-rail-mounted flashlight or laser onto a non-railed M9 frame.