Hold on, I don't think that's right. 40Ps do not use a P01 slide. They use a 40B slide left over from the Colt contract. The sight cuts are absolutely not P01 cuts. They are Colt Defender cuts that are very difficult to find anything that fits them.
I have a 40P and a spare 40P slide that I run on a 75B Compact in .40 and would love to find replacement sights, but nobody makes them. You used to be able to find Big Dot sights for the 40P and 40B but I don't know if they still produce them.
The 40P frame is essentially a P06 frame, which is the same as the P01. If CZ put a P01 slide on it, it would just be another P01.
In the pic below, the two on the bottom are the ones I'm speaking of.
