A day or so before I posted this, I had asked Sig C/S what the optic window size(s) of the Romeo X Pro and Compact were; today they came back and confirmed they were the same.
Attachment 117191
Thing is though, they indicated "24 mm", which is weird because this is almost an inch by an inch (1" = 25.4 mm). I put a 24 mm x 24 mm box at the bottom of my chart, thusly:
Attachment 117192
Does anyone actually have a Romeo X, and if so, can you see where a 24 mm opening would fit into the optic? I think there's something I don't understand about Sig's answer here...thanks!