550 Rear sight

[John J]

My new CZ has the rear sight cut crooked and off center. I called and was told to take it off and send it in for a new one. All well and good but there is a dent in the front of the rear sight. Looks like it's staked in or is this a witness mark for sight adjustment? Does the new sight need to be restaked or depending on final fit? It's on a 416 I don't want any chance of it moving accidentally. Thanks, John

 

[Longwalker]

It is both a witness mark and also serves to fix the sight in position. Remove the sight by tapping it out to the right. If i were you, I would make a similar mark on the new sight after installation and sighting in.
In my experience most new sights will need to be fitted to the slot by using a 3 sided file, ground smooth on one side. This will allow you to file only on a single surface, in order to taper the sight very slightly to allow it to fit in the rifle's dovetail properly. Taper should be wider on the right side, narrower on the left. File slow and easy, removing very little, checking several times for a tight tapped-in fit, right to left.