Thanks!
The diameter and distinctive side tab pattern identifies those as the classic design originally for Anschutz M18 sights (it's ingenious; since the tabs are assymetric in both horizontal and vertical planes, the inserts cannot fit upside down or backwards). These have been adapted by many other makers including Haenel and - as I've just learned! - later Walthers.
The diameter and distinctive side tab pattern identifies those as the classic design originally for Anschutz M18 sights (it's ingenious; since the tabs are assymetric in both horizontal and vertical planes, the inserts cannot fit upside down or backwards). These have been adapted by many other makers including Haenel and - as I've just learned! - later Walthers.
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