Good luck lining this up with your day scope. - Armasight Apollo-Pro MR 640 1x50mm Thermal Clip-on Sight

I don't have any problem with the scope by itself, but good luck if your going to clip this on your gun with your day scope. If your day scope power is 3 or more, which most are, the picture will be distorted.

Also it was a nightmare trying to line it up with my day scope. I finally got it to line up by using two mounts, one on top of the other. Looks terrible.

The clip on to scope adapters that come with it are plastic and cheap, and in my opinion, aren't a efficient mount. Not to mention, none of them fit my 42;mm scope.

In my opinion, this is a stand alone sight, to be used by itself and that's why I would recommend it.