IBM made 6% of all M1 rifles used in World War II, about 346,500 of them*.
These photos were posted to gunvaluesboard.com in 2012 by an unidentified
person looking to sell an IBM M1 manufactured in early 1944. Click each
image to enlarge.
This information was found at the Smithsonian Institution some years
ago. They still have an IBM M1 in their collection,
but the information about numbers has disappeared.