Now you can own the same advanced scope technology that made U.S. military snipers in South Vietnam feared by enemy soldiers from the North. Developed by Jim Leatherwood, his now famous ART (Automatic Ranging & Trajectory) scopes made it easier for the military to train qualified long-range snipers by practically eliminating the need to estimate range. Thanks to a simple to read "through the lens" ranging system and fully adjustable external Camputer Cam System, soldiers were able to precisely place shots at ranges far beyond the practical limits of open sights or conventional telescopic sights - without having to guess the range or calculate bullet drop. Over the years, the Leatherwood / Hi-Lux Optics Camputer scope system has been steadily improved and is still in use by the military and law enforcement snipers. Now Leatherwood / Hi-Lux is introducing the new revolutionary ART scope that has the interchangeable Cam System like the M-1000.