I'm not sure what the OP is asking...
What is the best rail mounted light for a pistol?
In no particular order: inforce apl, surefire x300, streamlight tlr1, viridian c5l or x5l, crimson light guard, to name a few. So many more good lights.
Full size handguns or compact handguns will play a major role in light selection.
What pistol is best with a rail?
No one can tell you what is best for you.
Are there different kinds of mounts for pistols? (I know how has its on rail, picattiny, 1913, weaver...these mounts?)
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