The M1941 Johnson rifle, sometimes called “Betsy” was a competitor to the M1 Garand during WW2. It is Chambered in the same powerful 30-06 cartridge as the M1, but lacks the ability to take en-bloc clips, thus being a bit slower to reload than the M1, ultimately make it less suitable for the job. A very unique rifle, it utilizes a circular internal magazine that holds ten rounds. The slightly more modern Ruger 10/22 10 round magazines function in a very similar manor, and I would speculate that they drew some inspiration from the Johnson rifle magazine. Another rather strange feature is that it is short-recoil operated, the type of action used mainly by pistols. I have never shot one so I can’t really say, but knowing this action type I bet it has pretty violent recoil.