Grif is right. I generally carry a full size stainless1911 (not to be confused with brainless1911). With an over shirt and the right holster (not a serpa), I can conceal it from observance by the average person. I don't have a serpa for any of my 3 stainless1911s (again not to be confused with brainless1911). I do have a serpa for my HK USP45. But I don't use it too often. I'd say how I don't like to, because of the wear plastic holsters have on the gun's protective finish, but I don't want to appear to be butthurt when mentioning my serpa holster. But I do use my serpa holster when I want retention while carrying my HK USP45, because my serpa holster is the only retention holster I have for my HK USP45. I don't have a serpa holster for any of my other firearms.