I just joined this forum to answer this question once and for all. I have been in pursuit of night sights for my Gen 1 P07 for a long time and I keep getting conflicting information regarding your exact question...does the CZ 75 sight fit the P07? The answer is YES, they do in fact fit the P07, but with a few things to note.
I decided I'd go out on a limb and ordered the TruGlo TFX sights from Amazon. I just fitted them up yesterday (2/14/16) and I can confirm that both the front and rear drifted beautifully into place on my Gen 1 P07 with minimal efforts and ZERO shaving or modifications of the sights. That being said, there are two things to note. First, you must pull your factory front post and note the number under it. Being a first gen, my factory sight post is #1, meaning it is the lowest factory sight setting. This may be an issue as my factory sight post measures at 5mm (#1) and the Truglo sights are 5.5mm. Secondly, the rear sight sits slightly taller and rests just above my slide instead of sitting flush on the slide. It's not enough to snag on anything and it's not a lot, but it doesn't sit flush. This variance may actually level out my Point of Impact with the slightly taller front sight. I'm also confident this will not stress the sight, as they are machined metal and high quality. The only question is how this will effect my point of aim and point of impact. I will be going to the range this week to see what impact this change has. There's a good chance it has altered POI, but I won't know for sure until I run some rounds through it. I will post back with my experience. For what it's worth, I have TFO sights on my M&P Shield and they have been flawless through thousands of rounds. Best sights out there as far as I'm concerned. That's why I was willing to give this a try. Worst case scenario is if my POI is grossly off, I can always put my factory rear sights back on and leave the very awesome, very bright front post in place with only a slight change in POI. Again, I WILL post back this week with my results.
I know there are other options out there, but there are literally none that I could find for my #1 front sight. I am a huge fan and believer in the TruGlo system. The fiber optic inserts are very bright for daylight shooting and the Tritium is superb for night visibility. It's literally the best of both worlds. Provided I am within an inch or two of POA and POI at defensive distances, I would consider these a viable option. I am not doing competition shooting with my P07. I am not trying to stretch the distance, though I will measure distance shots and variance with POI. I will also post pictures as well. I use my P07 for CCW and home defense. I'm simply not reaching out to even 30 yards with it, but for this test, I will measure out 3, 5, 7, 10, 15, and 20 yards, though that is pushing it for precision firing. Any other requests?