I have a couple of rifles with an aperture sight inletted into the stock which fold up. One is on a Mauser the other on a Steyr. (I chose this forum because I have pictures of the Steyr handy.)

My question is, how are these sights intended to be used? Are they a "tang sight" like the Lymans for use solely with the front sight or is the aperture a "focusing device" (similar to a pin hole camera) to be used with both front and rear?

https://imgur.com/rBbhH4h

https://imgur.com/XFOhmVf

Apparently I don't know which option to select from Imgur.....sorry.