Olight S15 mod. Two of them actually, one an S15 and the other an S15R
Once I managed to get the bezels unscrewed these just fell together. A month ago I ordered some optics from LEDDNA. They arrived a couple of days ago.
I unscrewed the bezel by pressing the front of the light against the tread rubber on my Tacoma. It was the handiest rubber around and gripped very well. A few taps on the workbench top and the lens popped out. I used the cell to push the driver / pill forward just a little. The movement made the o-ring that was trapped by the reflector work loose enough to be able to remove it with tweezers.
I found a rubber stopper that was the right size to fit against the reflector lip and that allowed me to unscrew the reflector from the body. Just in case I want to use the reflector again it is unmarked.
There is another thread here on doing this mod. It it the author found it necessary to sand down the back end of the optic a little, in order to be able to thread the bezel back in all the way. I don’t know what is different but I did not have to sand.
One of the optics I used is a 25 degree and the other is a 60 degree. Both need to be removed from the white holder they came in. A small jewellers screwdriver was used. Then the optics were dropped in and the bezel threaded back in. That was it, other than inserting a cell and installing the tailcaps.
Reassembly was done without the glass lens and without the oring, so they are not as waterproof as they were before the mod.
I have not decided if I have a preference for one over the other. I like the 60 degree with its nice even spread of light. The 25 degree is more centrally concentrated but more diffuse than the stock reflector. I will be playing with them later as it gets darker. I also have a 15 and a 45 to play with. I’m thinking I might prefer the 45 over the 60, and that the 25 is good for some other uses.
The apparent color of the light has changed with the change from reflector to optic. It seems to have shifted slightly to be more neutral. Still very white (stock XM-L2 emitters), but somehow nicer.