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If someone that has the rear sight control knob on their rifle would be willing to provide a few critical measurements, I think I can manufacture my own without too much trouble.

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Scott, here are some photos and the measurements of the “control knob” or elevation adjustment disc of my original Rigby peep sight.
Diameter of disc: 18.73 mm = .735”
Thickness: 2.89 mm = .115”
The disc is held to the peep stem by a tiny screw in it’s center, diameter 2.01 mm = .078”
A small stud on the disc, diameter 1.58 mm = .062 , 2.3 mm = .09” high, distance from center 7.1 mm = .27”, rides the horizontal slot in the base.

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