Need some guidance refitting a CZ-75 Pre-B

[Skarekrow88]

If the spring is in that groove the groove is in the wrong place or the slide stop was in a different pistol at one time.

I’m pretty sure it’s the latter. I measured the distance between the back of the slide stop and the notch which came out to 0.95” while the distance to the outside surface where the slide stop should be and the retaining pin is 0.85”

I'm amazed your slide stop works as far out as it sticks from the left side of the frame.

I am too honestly. I took a closer look at it with the slide off and inserted the magazines I have for it. The followers just barely interface with the slide stop just enough to function.

I guess I’ll be ordering a CGW slide stop for narrow frames. I don’t exactly love the look of it but at least I know it will be the proper fit.

[tdogg]

Something else I had been meaning to ask but forgot about until now is my pistol has a sizable gap between the slide stop and the frame when installed. It functions fine and always has so there's no current issues or any that I can foresee happening. I was just wondering if this was typical or is something weird going on here such as a different models/generations slide stop got installed in my gun at some point in its life maybe?

Below is a picture
https://imgur.com/B51qo8f

I agree that looks like the wrong slide stop for that pistol.  The alloy frame variants have a wider frame and thus a longer slide stop pin.  I'm not familiar with PreB differences compared to 75B but I'm guessing that is the wrong slide stop pin for the frame width.

Cheers,
Toby