I am looking for a new gun that I can carry concealed. I have a S&W sigma but it is to large for me to carry when Im only wearing a t-shirt. I am a very thin guy. Im only 140lbs and 6 ft tall. I dont want anything smaller than a 9mm and would prefer a .40cal like my sigma so I can use the same ammo and also for the knock down power. I have been to gun ranges and used the rental guns but this being TX all of the rental guns are large frame guns. Out of all of my friends and family that own guns they are all large frame pistols other than my dads airlite 9mm POS. Do yall have any suggestions?