I checked with my Armasight tech rep and he replied:
"No idea what he’s trying to do. The CO-Mini is night vision, not thermal.
Armasight doesn’t sell a 3x magnifier for our Jockey clip-on thermal.
He can buy any 3x magnifier and use it with the Jockey. Armasight just doesn’t make one."
Take a look at the
Burris RT-3 Prism Sight - Ballistic 3X