RE: recommend me a concealed carry gun
S&W 642
Hammerless, light weight, plenty of power.
Never Jams.
No hammers to snag, no slides to lock, no safteies to remove. Heavy trigger pull makes an AD almost impossible (if not completely so).
I used to carry mine in the pocket of my jeans or shorts in the summer time. I went with a wooden grip since rubber can catch on clothes, and wood is less prone to do so.
Can't be beat for a carry gun.