Some pistols can be milled in front of the rear sight, but taller sights will be necessary to use without removing the optic.
I like small red dots optics on pistols, but I run mine a little different than most. Since I am very a custom to picking up the front sight of the pistol and only the front sight, I have a hard time finding the dot when it's mounted on the rear of the slide. I like them mounted closer to the front sight, but that's just me. And NO, being closer to the front doesn't make the recoil any harsher and NO they aren't affected by muzzle blast.
Ever spit it out rather than swallow it?
Enjoy it while you can. One day you might be complaining about NOT getting random pop-ups in the morning.