The M1947 Johnson auto carbine is a semi-automatic derivative of the M1941 Johnson machine gun.https://www.americanrifleman.org/content/the-johnson-auto-carbine-a-firearm-history-footnote/ It was intended as a replacement of the M1 rifle but not accepted. The auto carbine never got past the prototype stage, with only five of them ever being made.https://www.thefirearmblog.com/blog/2017/02/20/firearm-showcase-johnsons-daisy-mae-auto-carbine-cody-firearms-museum-high-res-pics/
See also List of .30-06 Springfield firearms M1941 Johnson rifle Model 45A M1946 Sieg automatic rifle
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