I have two Krag rifles, one has a 1900 cartouche and is in very nice condition and one has a 1903 cartouche and is in okay condition. The rear sight on the rifle in the best condition has a broken windage adjustment shaft and the adjusting wheel is missing. I was thinking of replacing it with a part from the 1903 rifle because I figured it would be kind of tough to find a replacement part. If I can't find the part should I replace just the shaft or the slide and shaft assembly? I like the sight on the earlier rifle because it has the rotating peep on it.

Here are the two sights.
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If I replace the windage wheel and shaft do I punch out this pin?
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Or do I have to remove this pin to replace the slide assembly?
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