Cocking piece sights for bolt actions were once fairly common.
The added sight radius and eye centering of the peep outweighed a LITTLE slop. A nice sporter didn't have much slop. Some were made to provide alignment of the cocking piece which Josh shows.
There were also receiver sights with pivoting arms to let the bolt handle in MN and MS split bridge actions pass by.
Uber deluxe European sporters even had tang sights that laid down into the tang as the bolt came back.
If Czarist and Soviet surplus is getting so uncommon that you don't want to drill and tap it for improved sights, that is another problem.
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