I was thinking about daytime visibility out to 40 yards or so. I did recognize that there is a reflection potential. The CMR-206 is worth looking at based on the reports here. As I had mentioned in an earlier post, if the laser is 2" above the bore then if I sight in at 20 yards then the poi will be about 2" low at 40 yards. This is well within error if the shot has a 6" pattern at 20 yards and a larger pattern at 40 yards. It's also a good "battle sight" for slugs. A 2' error will make no difference for either the shot or slugs. That is probably better than I can shoot when in stress.