This is a standard front sight aperture for a 22 caliber Anschutz biathlon rifle with measures 38, 12

The measure 38 means that the diameter of the central hole is 3,8mm

Measure 12 means the thickness of the physical innermost circle.

You can print this with a normal print profile, but the seem can come in the way of the sight hole (depending on your skill/luck).

I printed this with the “scarf” feature that's on OrcaSlicer, currently that feature isn't available in Bambu Studio.

I will update the page with a print profile when that feature comes to Bambu.