It's not a battery issue (I've tried replacing them on the spot without success, and the dot doesn't dim or fade - it goes from bright to nothing). "Later" is a little tough to define. Here's how it's gone: I shoot a few shots, suddenly the dot goes out right after a shot. I mess with the brightness adjustment, remove the battery cap, check the battery cover and contacts, bang it around, take a few shots, etc. but nothing brings it back on. I figure it's permanently broken and put it away. Then I try it again a few days later at home and it works again. I shake and bang it around a little and it seems solid. I take it shooting again, and the same thing happens. I shoot a little more after it goes out this time (with no usable sights or accuracy - I've learned that the tube sight is totally useless without the dot - even at close range). Suddenly the dot comes back on...for a few shots. Then it goes off again. Sometimes I can just switch to a different rifle when it goes out, and if I try it again 45 minutes later it may be working again. It is obviously recoil shock-related (it ONLY goes out when fired). I would love to know how to make it reliable, because it is otherwise a nice sight and works well with the rifle ("but other than that Mrs. Lincoln, how did you like the play?"). I called about sending it in to the company that has taken over Tasco's service (it was still under warrannty), but they wanted something like $28 just to look at it, and since the only way I've found to make it fail is to attach it to a rifle and fire a few shots, I'm afraid they'll just say "its fine" and send it back. Tasco going out of business was definitely bad timing for me.
Doug
