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Thread: Buffer Spring - what's the deal?

  1. #51
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    I thought we were supposed to be talking about springs here

    Anyway Ive switched to springco springs in 2008 after I found out my USGI springs from BCM were lasted a whopping average 3k rounds before it had to be replaced. I believe there is enough feedback on this site that proves they arent just snake oil and do last quite a bit longer.
    Last edited by vicious_cb; 05-09-11 at 02:02.

  2. #52
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    How can you tell it's time to replace the spring - obviously you don't want to wait for feeding problems.
    Per Ardua ad Astra.
    STS - gone but not forgotten.

  3. #53
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    Quote Originally Posted by EnibraCFourM View Post
    How can you tell it's time to replace the spring - obviously you don't want to wait for feed problems.
    Measure your springs. I found this with a Google search:

    https://www.m4carbine.net/showthread.php?t=67974
    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

  4. #54
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    Quote Originally Posted by DOA View Post
    Several people I know have the MOE and have complained of rattling/movement. The CTR's, at least mine and a few others are rock solid. Probably due to the additional lock.
    They need to either buy BCM lowers or BCM RE's. The MOE's are TIGHT on them (not that it really matters though).



    C4

  5. #55
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    Quote Originally Posted by EnibraCFourM View Post
    How can you tell it's time to replace the spring - obviously you don't want to wait for feeding problems.
    Measure it, or just pull it between 3k-5k.



    C4

  6. #56
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    OK, so measure it, "Carbine spring lengths should be between 10 1/16 up to 11 1/4 inches", or pull sometime between 3-5K.
    Kinda like -oilchange....3 months or 3000 miles.....
    Sounds good, thanks..
    Per Ardua ad Astra.
    STS - gone but not forgotten.

  7. #57
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    Quote Originally Posted by C4IGrant View Post
    Measure it, or just pull it between 3k-5k.



    C4
    This seems like a very good opportunity to explain the benefit of a good aftermarket spring, like the blue Sprinco that you said you used in another thread. You can let a quality upper go for 20+ thousand rounds without cleaning (see the Pat Rogers BCM "Filthy 14" test in SWAT), but you're supposed to change the CS spring 4-6 times in that period?

    I don't advocate that people who are relatively new to the AR or who have a poor understanding of mechanics and physics start going for color-coded springs, but there is upside to it if you understand it.

  8. #58
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    Quote Originally Posted by Boss Hogg View Post
    This seems like a very good opportunity to explain the benefit of a good aftermarket spring, like the blue Sprinco that you said you used in another thread. You can let a quality upper go for 20+ thousand rounds without cleaning (see the Pat Rogers BCM "Filthy 14" test in SWAT), but you're supposed to change the CS spring 4-6 times in that period?

    I don't advocate that people who are relatively new to the AR or who have a poor understanding of mechanics and physics start going for color-coded springs, but there is upside to it if you understand it.
    No, you do not change out CS springs that often. Typically I would do it every 20K (on the low end side), but honestly speaking, it should last for 100,000 rounds.

    I did a general guidline for springs and buffer weights for those that do no undertand what is going on in their weapon.


    C4

  9. #59
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    Then I was confused by what you meant by "measure it or pull it at 3-5k".

  10. #60
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    Quote Originally Posted by Boss Hogg View Post
    Then I was confused by what you meant by "measure it or pull it at 3-5k".
    Sorry. If the SS buffer spring is past 5K, just pull it and put a new one in. If you do not know how many rounds you have fired through the SS spring, then measure it.


    C4

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