+1surefire X200/X300 without question.
I don't see why there is an issue with size. If you are using it on the pistols you are using it on the pistol. If you have it in a holster made to fit the gun+light then the holster will be able to fit gun+light.not to mention its gigantic! The X200 is half its size. Looks great on the AK but to big IMO on a pistol.