I'm not a fan of light rails, however, they might have a place on a full size duty weapon, or a home defense one. I feel the idea is absurd for a CCW, I am better served by a stand alone flashlight. Most of the LE units in my area carry a duty weapon with the light attached in their night gear. I have a couple of pistols with rails, (full size Glocks) but don't own any ge-gaws to hang on them. As Zcrap2 mentioned, I too am amused at the number of people that buy a light, compact, pistol for CCW and start adding grip extensions, lazers, taclights, and crap all over them.
Savage