The_Driver
Flashlight Enthusiast
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from the linked German forum, what does "the Collihead is made by Feilong" mean? Is that the name of a maker of lens assemblies, or another hobby enthusiast screen name or what?
Without going too off-topic, the Mjölnir is based of a K40 body and Flydragon (Fei Long) head {Which like most long distance throwers have a collimator lens set-up).