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Thread: Mckay Receiver

  1. #1
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    Dec 2012
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    Mckay Receiver

    Slowly making progress on a build with a Mckay receiver and Mckay bolt. Next is to determine what recoil spring is needed for the bolt. I'm seeing that the full auto recoil spring is needed for the Mckay bolt having tolerances for that spring. Or is the standard semi auto spring needed?

  2. #2
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    Dec 2012
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    Found some info on here that the McKay bolt is machined deeper to work with the standard FA spring.

  3. #3
    Registered User
    Join Date
    Mar 2021
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    23
    Yes you use a SMG recoil spring and cut the fiber pad off of it. I think some or most of my McKay bolts shipped with instructions.
    You can also use build threads like this https://blog.roninsgrips.com/uzi-par...o-uzi-carbine/

  4. #4
    UZI Talk Supporter

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    Jun 2020
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    Was under the impression that McKay bolts were modified full auto bolts...

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