Its got the wrong fore end and rib to be an XS. I think it’s a Citori Lightning Sporting Clays. That has the slimmer profile lightning field type fore end and low rib. If we could see the bottom of the grip that would confirm, because the Lightning has a round knob.
I was mostly going by the gold writing on the lower receiver and the gold line outlining the upper part which is a give-away for an XS. However you are correct, the fore piece is missing the finger grooves common on the XS. Hmmmmm.