It depends on which pin and what kind of chip. The main, or rear pin has a cap or "shoulder" on it, like the head of a screw, which rests in a recess in the toggle arm. This keeps this pin from falling through the arm. It can only be removed from one direction. If a portion of this cap or head has been broken off, which I have seen on numerous occasions, it will not affect the function or safety of the part. It is, really, the only place on the typical pin which I can see "chipping"
Unless this part is numbered and you are buying a collector Luger this will not be a problem.
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