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Thread: Buffer spring rates?

  1. #11
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    There's points of equilibrium and all the potential energy stuff that coincides with gravity, weight, friction, air resistance, ect...

    In the end, I guess none of it matters
    Muzzle punch optional.

  2. #12
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    Just buy colt USGI springs and never look back.
    "You people have too much time on your hands." - scottryan

  3. #13
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    I am just asking because quite frankly I think too many people are worried about things like this when they needn't be.

    Quote Originally Posted by Reagans Rascals View Post
    I'm considering a custom build, and without getting too far into the details about the recipe before the pig is cooked it would be helpful to know the different spring rates, as far as what amount of force they exert.

    It would be a linear equation however there are quite a few very important details missing before one could derive the right numbers, such as the modulus of rigidity of the material, number of coils, wire diameter, outer diameter of the spring, Lfree and Ldef, and the applied load on Ldef.

    I was just hoping someone had a published list of the rates on hand, like for example "the standard carbine buffer spring rate is usually 18 ft lbs." or something similar.

    I guess If needed I could secure a standard carbine in a bench vise and use a pull gauge on the charging handle to measure pounds of force to compress the different springs...



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  4. #14
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    What more do you need to know?

    (Credit to whoever made this originally, I just find it handy.)

  5. #15
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    Quote Originally Posted by TangoSauce View Post


    What more do you need to know?

    (Credit to whoever made this originally, I just find it handy.)
    ===================================

    Uh ohhhh!

    You did it now....

    .

  6. #16
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    The dreaded chart rears its head...
    Black River Tactical
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  7. #17
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    Quote Originally Posted by Clint View Post
    The dreaded chart rears its head...
    What's that line?

    "I hate the (ejection) chart and all it stands for!"

    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

  8. #18
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    Action Spring Analysis

    Last edited by rsilvers; 12-08-11 at 19:18.

  9. #19
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    Didn't know that chart would get people roused.

    Carry on.

  10. #20
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    Quote Originally Posted by rsilvers View Post
    thanks for the link, that's pretty much what I wanted to know.

    Has nothing to do with case ejection or anything of the sort, as my inquiry has nothing to do with 5.56 or the operation of the AR-15/M4 in any capacity.

    I have a custom build in the works, for which the spring rate needed to be known in order to continue with forward progress. It is critical the spring rate not be above a specific number and from the data listed it looks like it will work.

    I'm not going to say what or why, but more details will be available as the build is completed.
    Last edited by Reagans Rascals; 12-08-11 at 20:28.
    When you can't make them see the light, make them feel the heat.. - Ronald Reagan

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