I'm NO expert.........but; Its my understanding from what I have read about the H&R Company, that ALL of the M-1's made by H&R came in too late for WW II but were "in service" for the Korean conflict. Doesn't diminish a thing and given what my father told me about WW II and Korea (he was in both up to his arm pits) that the conditions in Korea were horrific in the winter.....summer, fall and spring weren't much better...... That the H&R saw "service" and performed so well, was, and is, a testament to the quality of the product produced and of course to the design of this wonderful rifle.