OP did mention that grand dad was in the marines, they went from 1903 straight to M1 and M1 carbines, that I know of there were very few 03A3s that went to the south pac theatre. the few that did find their way into the hands of GI went with Army to Europe and Africa.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
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Bean counters told me I couldn't fire a man for being in a wheelchair, did it anyway. Ramps are expensive.-Cave Johnson.