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Thread: Question about Receiver extension torque

  1. #21
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    Quote Originally Posted by Scattergun View Post
    my Magnum's lugs torque to 100-110 ft-lb

    Which is the same order of magnitude as 40 ft lbs.

    You just need to tighten this snuggly and stake it.

    I wouldn't go past 20 ft lbs.

    To many buffer tubes and barrel nuts are ruined by having some gorilla on these parts.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  2. #22
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    Quote Originally Posted by scottryan View Post
    To many buffer tubes and barrel nuts are ruined by having some gorilla on these parts.
    Don't forget ruined knuckles

  3. #23
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    Quote Originally Posted by David Pennington View Post
    I've contacted Colt and Ken Elmore. Both note that the correct torque on the carbine receiver extension is 40 ft-lbs. They note that you are torquing a steel castle nut against a steel receiver plate.

    I know what Colt recommends.

    You are torquing steel threads against aluminum threads. The threads are taking the most violent load. The end plate and end of the castle nut is taking a less substantial compression load.

    The reason for my position is I don't buy into the line that "only a little effort on the wrench" and you can undo a factory carbine stock.

    Over half of the stocks I work on need to have the staking and/or castle nut cut away to avoid striping out the keyway on the buffer tube which turns a five minute project into a $100 project.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  4. #24
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    How much Moly do they recomend on the threads?

  5. #25
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    40 ft. lbs. on an motor vehicle alloy wheel? I don't think so! Torque your wheels & weapons properly so you won't have any problems. Torque is specified for a reason, not just so someone can dismiss it's purpose or usefulness.

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