I looked up a picture of your Olight as I wasn’t familiar with it. It shows a grip ring of some sort right below the tail cap. That ring doesn’t make contact with a hard surface when laying it on it’s side? Hard to tell from the picture if the angle is too great for it to make contact with a table or whatnot. Maybe something like this from Surefire could help out.
https://www.surefire.com/combatrings-cr-kit01.html