M14 the polytech OK? and M1 carbine 30 cal

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  • Drmsparks

    Old School Rifleman
    Jun 26, 2007
    8,441
    PG county
    The letter was posted in the original thread I believe.

    The interchangeability of parts was based on the threading of the barrel and the gas system. Metric threads vs english. It was my understanding that the bolt didn't even figure into the equation.
     

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