I always wear carpenter jeans and I carry on the outside with my shirt untucked. I can wear and XL shirt but always buy a 2XL. It works out well because I like my stuff a little more baggy and comfy.
If not in jeans, I have all cargo shorts. I can fit a 1911 in one pocket and (if I wanted) 15 loaded magazines in the other pocket. Obviously, I wouldn't carry that many, but there are a lot of options if you just take a toy gun to the store and try on some cloths.
I hope I shall possess firmness and virtue enough to maintain what I consider the most enviable of all titles, the character of an honest man.