Prints in 3 pieces. Glue the clip & ring onto the main body piece. I've used PLA & superglue as of when I'm uploading, and it seems to be holding up fine. A stronger adhesive is probably a better choice though.
Remove the black o-ring from your Noctigon KR1 or KR4 before installing. It is not necessary for this design and it can get in the way. Removing it will not impact the light's water resistance.
The author marked this model as their own original creation.