It's cold and windy outside, and NRA Museums firearms specialist Logan Metesh is huddled over his sewing machine. He shows John Popp one of the rare Singer production study 1911s. They made only 500 for the U.S. Army Ordnance Corps to determine whether they could make 100 guns an hour. By 1941, before Pearl Harbor, Singer determined they couldn't do it. So, they divested themselves of the manufacturing unit, making no more. For collectors, they are the rarest of the rare.