I hate the idea of hanging crap off my guns.
If JMB wanted you to have a light ,coffee maker ,and cell phone he would have added a USB port.
The ONLY thing I would consider adding to a pistol is a reddot sight, but now a days it's hard to find even a revolver that doesn't have one of those ugly ass rails marring it's lines.
What really irks me is that with laser grips and guide rod lights and lasers, there's no need for it.