Thanks for the info, much appreciated. I'm planning to add a single stack 45 Auto to my 45 CCW collection. I have XD-Mod 2 Subcompact's in 40S&W and 45Auto. These are really nice shooting guns but, in my hands, they are very top heavy and feel bulky. I only occasionally carry the 40 shown in the picture and seldom carry the 45. The XD-S in 45 is on my RADAR as a CCW in 45 Auto but I don't want another bulky feeling Mod-2. Finding one to put in my hand at a LGS is almost impossible. Every shop around here seems to stock just Glocks. That's why I'm interested in knowing that dimension, 1.6" is only a slight advantage over the Mod-2's 1.7".
BTW, my current subcompact 45 Auto carries are the Shield 45 and Kahr CW45. I've looked at a G36 but found it to be too big for CCW. I might consider a Khar PM45 or CM45. On the other hand, I might just stay with my Glock 27 with 200 grain Speer Gold Dots as it's practically a "45 magnum".