Just my preference, I really like my HK P-7 M8 single stack 9 mm Para.
One of safer methods to carry, not zero, but nearly zero chance of an unintended discharge.
Accuracy is exceptional for a non target type pistol.
I've never found a round yet it won't chamber, fire, eject and reload.
It is flat and easy to conceal.
Down side, it is heavy. But the extra weight makes a double tap easy.
You really have to clean it after a couple of hundred rounds, I usually clean it after a hundred.
I carry mine high under my armpit, with the proper holster I don't even notice it is there. Not the quickest draw but the most comfortable for me.
Funny I have factory tuned target pistols in 9 mm para, my P7 shoots nearly as well. It just seems to fit me. I have large paws but still prefer a single stack.