Our first foray into night vision (before we knew better) was an ATN. Our ATN experience was as follows:
Us: "We bought this Gen3 Nightvision scope 4 years ago, and for some reason the entire front objective bell is coming loose and causing the scope to lose zero. We'd like to send it in for repair."
Them: "That scope is out of warranty. We don't have any parts so we can't repair it."
Now, we knew the out of warranty part, I think it had either a 2 year or 3 year warranty. We were expecting to pay for the repair. But it was barely out of warranty, and they refused to even look at a $3500 unit "becasue they didn't have any parts"?? WTF? Its not like the NV tube was shitting the bed, it was a physical housing failure that anyone familiar with their scopes should have been able to fix. Hell any random gunsmith probably could have fixed it, but we wanted to send it to ATN because of its value to be sure it was done right. But they wouldn't look at it. For that reason, we will never buy ATN again.
Thankfully, it was just some loose set screws so I was able to repair it. These screws are T I N Y and they hold the giant objective bell in place on the main scope tube. So easy to mess up, but once they said they wouldn't do it we had nothing to lose by trying. So we successfully tightened the screws with a tiny screwdriver and taped the shit out of the bell hoping it wouldn't loosen again. Time will tell, so far so good.