I have the Tic rail on my M9. Its entirely servicable/adequate. However, it postitions many lights in an "uncomfortable" fashion. While not as comfortable as other light mounts, its still solid and effective. There is a teflon screw that you tighten against the trigger guard to prevent the mount from drooping. Take care not to bugger this up...
I paid 35.00 for mine, and its entirely servicable/adequate. I just wanted the means to attach a light to my M9, should I ever need/want too. I like the M9 enough to buy the M9A1, however the A1 lacks the "Martin Riggs" factor, which I really appreciate.
My M9 is no longer my primary defensive handgun, however I would probably choose another mount for LEO/military service. I would secure a mount or mount/light combo from Surefire and an appropriate holster. Bladetech could make you a holster for this application....Surefire makes the best weapon lights out there and they have tackled the M9 and Sig P226 mounts years ago. If you don't have a M9A1 or P226R, Surefire is the best choice for a light/mount.