I guess that IF I could have only one handgun it would have to be my Ruger 45. Second on the list would be one of my Sigs. Not sure if it would be the P225 9mm(old style) or my P239 .40 with the XS sight systems Big Dot 24/7 sights. I have tried to get a set of those for my Ruger but they don't make them for the CMD version. I REALLY like those sights. As their slogan goes, "Just dot the I".