You very seldom have to break the windage screw to change sight blades. I reuse them most of the time. You only need to break them if the crimp on the nut side is too big. That said, it is easier to just break the screw and use a new one. Finding the right entire assembly for an older gun can be difficult. Finding a new blade, screw, and nut is very easy. You can make a spanner for the nut out of a 1/4" hex screwdriver bit for a buck or 2.
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