Poor product - Laser Genetics Green Laser Designator with Scope Mount Sub-Zero

This is 2nd one of these I bought. The first one was a nd30 a few years back and it didn't work if was lower than 60 degrees. After about 3 months it quit working. So I saw that had improved their product and now it works in cold weather. Got the new version put their battery in it and it worked pretty good. Then I went to change out the battery and the switch cap stopped turning. (I have been a technician for major auto manufacturer for 40 years.) The aluminum threads messed up do to poor machining. I have had this problem with the aluminum fittings for a/c systems. I have threw them both in the garbage. Streamlight is the way to go for a varmint light. Will not get another nd really don't want it even if they were to give me another one two or three of them.