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Yes I have another Rock Island M1903 Rifle. This rifle has a H.S. ( High Standard ) barrel 12-44 date. The year of manufacture for serial number 379xxx is 1920 .
Production of barrels and assembly of rifles continued to the end of 1922.
All rifles recalled and rechambered for .30 caliber in 1906.
The improved heat treatment started at 285507.
Introduction of nickel steel started at 319921.
 

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