I have a really tiny carbine build in mind with a 7" rail and I'm doing some "lego-blocks" playing around with a variety of SF Scout style systems I have and they're all too big.
I tried an X300 handgun light, upside down on the top rail and it's also not great, because that's where I'd put my thumb.
The best I've come up with is a 3V scout light on the "weak side" rail, and then either I rotate the gun inboard and use my thumb on a rear push button switch for permanent on, or I install a tape switch to the top, which I'm trying to avoid.
I came across the Princeton Tec Switch which actually seems kind of perfect for this gun. I don't need to blind anyone. I don't need to PID at 50 yards. The Switch seems like a photon microlight with a pic rail. Perfect! Except the switchology is goofy. I really want momentary on. Otherwise I can just put the Scout on the "weak" side rail and rotate the gun and push the button for constant on when needed.
Is there any option I'm missing that exists?