M70 bolt, Wondering what is the use of that piece...

Discussion in 'Gunsmithing' started by adzhoo, Nov 2, 2019.

  1. adzhoo

    adzhoo AH Senior Member

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    Adjustments.jpg

    Does anybody know what is the use of the part #22 on a Winchester post-64 CRF bolt?
     

  2. Wyatt Smith

    Wyatt Smith AH Enthusiast

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    I’ve wondered that myself. My uneducated guess is that the didn’t want to have a longer bolt stop for some reason.
     
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  3. JimP

    JimP AH Elite

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    According to it's name on a schematic it is a gas block
     

  4. Wyatt Smith

    Wyatt Smith AH Enthusiast

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    Yes I remember reading that now in my big book of turn bolt rifles. It keeps gas From running down the track for the bolt lug and into your face in the event of a ruptured case or broken bolt or some catastrophic failure
     
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  5. adzhoo

    adzhoo AH Senior Member

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    I wish they would have thought this better. The ring (part #15) is extremely thin and weakened be cause it has to hold that piece.
     

  6. curtism1234

    curtism1234 AH Enthusiast

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    Good to know, I have been wondering myself
     
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