Check out a holster called Thunderwear (
http://www.thunderwear.com) . I have worn this under gym trunks and shorts with Sig 229 w/ no profile. I prefer my S&W 642 or Glock 27 which fits better, but the point is that you can carry a full frame just as easy. Might want to practice with this a bit in that it carries right over the groin. Could shoot something off you might need if not careful.