I just recently bought a Polystinger for normal use. I noticed that the lens is pretty thin and low quality. Is there a replacement lens of some sort available for the Polystinger?
Not to my knowledge. You could have one made by Flashlightlens but I think it'd be pretty difficult to replace it yourself. The lens on the poly is not designed to be user replaceable.
If you find a way to do this please let me know. I'd love to go UCL or even borafloat in my poly.