I have a copy of a book originally issued by the U.S. War Department in 1942 called U.S. Shotguns All Types. It lists various models and how to operate and strip them. It lists Winchester M97, M12. Remington M10, M11, M31, Sportsman. Stevens M520, M620, M620A. Savage M720 and Ithaca M37. So I suppose all those models saw service at some point or another. Lagopus.....