Which sight?
Military Mark 1 sight had the micrometer-screw adjustment but for range only. For side-to-side you adjusted the front sight sideways. Should be some available from this board.
Parker-Hale made most of the completely-adjustable Match sights, but Alex Martin of Glasgow turned some out as well. You run into them sometimes on the EE or a gun shows.
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I got mine off ebay. $40.00 shipped from Arizona.
EDIT there's one there now for $54 + shipping.




























