They didn't. they just repaired it and returned it (after a little over a month). I don't recall seeing any special explanation of the receipt, just that it was repaired and returned. I haven't even been able to try it yet, where I am right now I have no weapons body to try it on, just a low cost nitrilon. I still don't understand why they reversed the polarity, all that does is make it incompatible in some situations. I wanted to use this on the dual head mount (part of what the new design addressed I thought), but I guess that would only be good for two lasers (Vis/IR ?).