Only the open (notched) rear sight blade of a Drilling has a pop-up mechanism, either only by hand, or operated automatically via the rifle barrel switch, through a long rod inside the rib.
The more rearward "hole tang sight" ony serves to provide a sharper picture of the two parts of main rear sight. You raise the rear tang sight via hooking in your finger nail.
The sight *opening* itself is adjustable only via drifting, and you can see the two concurrent mortises, which rrun horizontally and vertically. Once you have regulated your open sights to your preferred distance and specific load, you can then adjust the tang sight so that the open rear sights are clearly visible exactly through the *center* of its opening.
Regards,
Carcano
