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some data on the original keystone springs

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  • RCS
    replied
    Can you post additional photos of your rifle ?

    Leave a comment:


  • Flightrn
    replied
    Good Day All,
    I was cleaning my early M1 and inspected my keystone main and compensating spring assembly. It is 18 15/16inches, 283 coils. The comp spring is 53 coils. They are not original to the rifle.
    Regards,
    Michael






    Leave a comment:


  • RCS
    started a topic some data on the original keystone springs

    some data on the original keystone springs

    I have been collecting data on these keystone springs foe awhile. While some springs might stretch or shrink, the number of coils remains the same.

    1) 19 1/8 inches 289 coils round body FR
    2) 19 1/8 inches 280 coil comp spring
    3) 18 3/4 inches 280 coils comp spring
    4) 19 inches 283 coils comp spring
    5) 19 3/16 inches 289 coils round body
    6) 18 7/8 inches 281 coils round body
    7) 18 3/4 inches 280 coils round body
    8) 19 1/8 inches 286 coils unknown
    9) 18 3/16 inches 275 coils round body part of spring broken
    10) 18 1/16 inches 56K rifle

    Some collectors have the theory that a longer keystone spring was produced when used with the round body follower rod. Nothing documented to date.
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