The function of a buffer spring for the AR-15

Discussion in 'General Firearm Discussion' started by ravencrofte, Jan 4, 2016.

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  1. ravencrofte

    ravencrofte
    portland Oregon
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    Does the buffer spring in an AR-15 only serve to push the bolt forwards once the spent shell has been ejected from the weapon? Are there other forces at work?
     
  2. 308

    308
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    The spring and buffer absorb the recoil energy by compressing rearwrd, then rebounding forward to strip and chamber a new round.

     
  3. rick benjamin

    rick benjamin
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    From FM 23-9, 2-1
    Functioning begins after a loaded magazine is inserted into the weapon.
    Feeding: As the bolt carrier moves rearward, it engages the buffer assembly and compresses the action spring into the lower receiver extension. When the bolt carrier group clears the top of the magazine, the expansion of the magazine spring forces the follower and a new round up into the path of the forward movement of the bolt. The expansion of the action spring sends the buffer assembly and bolt carrier group forward with enough force to strip a new round from the magazine.
     
  4. 308

    308
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    Also check out David Tubb's videos on flat wire recoil springs. He also talks about buffers as well.
    I run his flatwire springs on my ARs

     
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  5. Certaindeaf

    Certaindeaf
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    Yes. Mysterious forces. If you listen closely you can hear the "sproing" of mystery.
     
  6. Stomper

    Stomper
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    That noise is just the woodland gnome version of a bar-mitzvah.

    o_O
     
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  7. 308

    308
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    The flatwire pretty much eliminates that sound.
     
  8. Pandaz3

    Pandaz3
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    I have a JP Buffer assembly....No Sproing!
     
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  9. Velzey

    Velzey
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    Coat that flat wire spring with grease and listen to any remaining sound disappear!!
     
  10. nehalemguy

    nehalemguy
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    But I like the "sproing". That's the sound of sweet, sweet freedom. :D

    E
     
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  11. Certaindeaf

    Certaindeaf
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    It's kinda like a cowboy playing a soothing jew's harp around the campfire.. but with gunfire. what's not to like
     
  12. Medic!

    Medic!
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    It supports and somewhat slows the buffer in it's rearward motion with the bolt carrier group.

    This may be why it's called a Buffer spring. Not a bolt carrier return spring. Which would make more sense. ;)
     
  13. Dyjital

    Dyjital
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    'Buffer'ing recoil
     
  14. clearconscience

    clearconscience
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    I built an AR and the spring that came with the tube made the worst "Spronge!" Sounds everytime it fire. It drove me nuts! Traded all of them out for JP springs. Much happier.
     
  15. cmica

    cmica
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    just take it out and shoot
     
  16. Stomper

    Stomper
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    o_O
     
  17. slimer13

    slimer13
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    I took mine out and that's now where I keep a tactical snickers bar. Works great and no sproing.
     

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