I briefly had an ATN Thor. It wouldn't recognize the memory card. Otherwise, it seemed ok. The return experience with Optics Planet was so bad it turned me off of Optics Planet and I have never ordered from them again. Of course that has nothing to do with the optic. Handling the Thor made me think about the heaviness and balance of the optic on the gun. Also, seeing the limitations of the dedicated mounting system. Rethinking it all, now that I had handled the Thor and considering that for that kind of money, I didn't want questionable quality, I went with a Pulsar and have been very happy. The Pulsar is a rifle scope format. This opened up rifle mounting options to basically any 30mm system, including quick release like the American Defense Recon. Personally, I think a rifle scope format is the way to go. And since you're already spending considerable money, spend a little more and get something you can count on. It's frustrating to spend a lot of money on something and the product is flaky.
I got mine from one of our sponsors
@gr8fuldoug at Camera Land .