I’ll begin this report with the one shortcoming of the American Technologies Network (ATN) X-Sight day/night scopes: they do not have an on-board laser rangefinder. That said, let me explain why I consider this a minor issue. If we get in the “Way Back” machine and plant ourselves a few decades in the past, we’ll discover there are lots of ways to closely estimate shooting distances.
I have managed to collect a pretty good cross-section of guns that includes everything from a neat custom .32 Magnum Ruger Single-Six right on through to my three (yes, three) S&W Model 629s with four-inch barrels. In between are a bunch of .22s, .22 Magnums, and a .38/.357 Magnum or two. The gun for the revolver class would, of course, be the self-tuned S&W Model 66 in .357 Magnum with a four-inch barrel.