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How do you think things would have turned out if the M1 Carbine had been accepted as the main infantry weapon of all US forces?
This means no SMGs and the M1 Garand is only retained in a scoped model for use as a designated marksman weapon.
And by M1, in this case I actually mean the OTL M2 variant with the selector switch and 30 round box magazine which effectively turned the M1 into a full fledged assault rifle.
How do you think these changes would affect the performance of US troops during the war?