I have an original ROTCM 145-30 "Individual weapons and Marksmanship" July 1958 that my dad gave me. In the section on carbines on P170, it states the Carbine M1icon has been replaced in service by the full automatic M2. It also only gives operating and dis-assembly instructions for the M2.

Great manual, as it has Carbine, Garand, 1911, M3 Grease Gun, BAR, and 22 bolt trainer.
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