Revic Optics BR4 Rangefinder.
I can’t think of another tool that has affected the rifleman’s life as much as modern rangefinders. More than the advances in manufacturing that have made accurate rifles common and inexpensive, and riflescopes that allow for unparalleled target acquisition, the rangefinder is what allows most of us to hit targets at faraway distances.
Just 20 years ago, riflemen estimated range with the naked eye and guessed. I attended sniper school a little more than 15 years ago and we had advanced all the way to teaching marksmen how to estimate range by measuring in units of 100 yards by visualizing football fields. It sounds effective, but we were guessing like everyone...