Who made these ?
Rear Adj Sight 507160060
https://www.milsurps.com/images/impo.../sl1600-17.jpg
https://www.milsurps.com/images/impo.../sl1600-18.jpg
I remember seeing this WRA carbine long ago with one on it-
https://www.rockislandauction.com/de...ine-30-carbine
Any ideas ?