To remove the reflector you would probably have to gently heat the head up Q3 style and slowly push the lens/relector down and away from the front lip of the head.
I wonder how well one of these would work on the various Nuwai flashlights that share that stock reflector? narrow beam reflector
Some of the outer edge would need to be removed and the lux would need to somehow be moved forward (add a slug?) but it looks possible.