remote pack tactical flashlight?

SouthArk370Z

You can find all sorts of light mounts at most gun stores. Barrel-clamp, Picatinny.

If you want to go the cheap route, I'd get a clamp-on mount and a handful of the $2.99 pocket flashlights you see at the checkout counter. The lights sold for firearm use tend to be expensive but are usually pretty rugged and often come with a remote switch that can be handy.

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