There was a man I once knew who both had a need to carry and experience in killing men up close and personally, as an ex-special forces type during the Viet Nam war.
His choice for civilian carry: the smallest .22lr auto he could find. Carried it in the hip pocket of his jeans. No holster.
I asked him why. He said; "It makes neat little holes."
That's what he wanted. Neat little holes. And he knew where to put them. And he knew how to do it. He'd BT/DT, and had perfect confidence in his ability.
There was no way I was going to tell him he didn't know what he was talking about.
