EC Bishop stocks were used on 1903A3 Springfield rifles used in competition and training by the US Army and the USMC. I posted a photo of one of them, which I now own. It orginally had an M84 telescopic sight mounted on it, in a Redfield base and ring set.
The stocks on the early 7.62x51mm Model 700 rifles supplied to the military for training, match shooting, and combat use in Vietnam, employed a walnut stock of the same design, weight, length of pull, pitch, drop at heel, drop and comb, aluminum buttplate, and grip as the Bishop stock on those 1903A3 Springfield .30-06 rifles of the same era.
Some of the uninformed may choose to believe that is a coincidence, but I do not think it is.
