How many times in history has one man’s vision changed the course of warfare? As short as that list may be, there is no more unlikely story than Ronnie Barrett…a photographer, with no background in building firearms…who dreamed of a shoulder-fired rifle that could handle the awesome .50 caliber Browning Machine Gun cartridge. The Barrett M82 semi auto .50 BMG rifle did indeed change the battlefield, but its birth was anything but easy.