I carry gen4 Glock 19, side note the knife is a smith and wesson border guard. They get along though.
I carry my Glock in a alien gear 2.0 which I just recently switched to from appendix carry. I find it extremely comfortable compared to an aiwb.
Why I carry the Glock 19? Well, why not. I love Glock. It an all around perfect gun for me. It’s everything and more when it comes to versatility and dependability. And being 6’3″ 210lbs it’s perfectly concealable. Bottom line, if it came down to it I most definitely bet my life on it.