A
Anonymous
I had a similar issue with the laserlyte rear sight, I had it on a XDM 40, but it would change modes when fired. I called laserlyte, and they told me that they have found it has something to do with the battery cap and spring and are sending me a longer battery cap with a better spring. Just thought I would throw that out there, it is free, I haven't received it yet to confirm that this is the solution, but according to them, this has fixed the issue in most cases.