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Thread: newbie question

  1. #1
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    newbie question

    Hey all,

    this may be a stupid question, but here goes.

    I have a carbine lower and a rifle length lower, each lower has the correct buffer, tube and spring. If I wanted to run the rifle upper on the carbine lower or vice versa, would each buffer/spring stay with their respective lower? basically what I am asking is "does the buffer and spring depend on the tube or the upper that it is running...?"

    thanks for entertaining the newbie.

    truckie453
    -Vinny

    The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because worth they believing in.

  2. #2
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    To my knowledge; which is very little, the buffer/spring should be paired with the upper(gas system.) Maybe someone else can chime in and tell you exactly the answer you're looking for. Unless you are saying you have a rifle length tube and a carbine length tube.
    Last edited by Thursday; 08-31-11 at 13:38.

  3. #3
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    Is this deja vu? The length of your gas system on the upper is going to determine the buffer/spring set-up on the lower i.e. carbine length buffer and spring would not be ideal for an 11" gas port(rifle length) and vise versa. The difference between rifle and carbine/midlength buffers and springs is length and weight and it's that way for a reason.

  4. #4
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    sorry if this has been covered before... I just want to make sure I am understanding you. If I were to swap my rifle upper to my carbine lower I would swap my buffer and spring because the weight of the buffer and spring is associated with the length of the gas system. Is that right?

    thanks and sorry for the redundancy of the question.

    Quote Originally Posted by jet80tv View Post
    Is this deja vu? The length of your gas system on the upper is going to determine the buffer/spring set-up on the lower i.e. carbine length buffer and spring would not be ideal for an 11" gas port(rifle length) and vise versa. The difference between rifle and carbine/midlength buffers and springs is length and weight and it's that way for a reason.
    -Vinny

    The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because worth they believing in.

  5. #5
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    If I'm not mistaken, the buffers should stay with their respective lowers ie. rifle buffer w/ rifle lower, carb. buffer w/ carb. lower.
    The longer rifle buffer needs to stay in the longer rifle buffer tube. Vice-versa for the carbine buffer and tube.
    Buffer length has nothing to do with gas system length.
    Some of the more experienced members can confirm this I'm sure.
    Hope this helps.
    lowdowndad

  6. #6
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    Quote Originally Posted by truckie453 View Post
    sorry if this has been covered before... I just want to make sure I am understanding you. If I were to swap my rifle upper to my carbine lower I would swap my buffer and spring because the weight of the buffer and spring is associated with the length of the gas system. Is that right?

    thanks and sorry for the redundancy of the question.
    DO NOT put your rifle buffer and spring in your carbine lower. It will cause damage if you fire that combination.

    You will be absolutely fine using your rifle upper on a carbine lower with the carbine buffer. It should shoot smooth with less perceived recoil than the carbine upper on the carbine lower.

    Heavier buffers and stronger springs are for shorter length gas systems, to handle the higher pressures from the gas tube due to the shorter gas system.
    "You can run...but you'll only die tired." - Spooky


  7. #7
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    Thank you both the the warning... I will not swap my buffers/springs.

    Thanks to all for the education.

    Quote Originally Posted by ac130usnsr View Post
    DO NOT put your rifle buffer and spring in your carbine lower. It will cause damage if you fire that combination.

    You will be absolutely fine using your rifle upper on a carbine lower with the carbine buffer. It should shoot smooth with less perceived recoil than the carbine upper on the carbine lower.

    Heavier buffers and stronger springs are for shorter length gas systems, to handle the higher pressures from the gas tube due to the shorter gas system.
    Quote Originally Posted by lowdowndad View Post
    If I'm not mistaken, the buffers should stay with their respective lowers ie. rifle buffer w/ rifle lower, carb. buffer w/ carb. lower.
    The longer rifle buffer needs to stay in the longer rifle buffer tube. Vice-versa for the carbine buffer and tube.
    Buffer length has nothing to do with gas system length.
    Some of the more experienced members can confirm this I'm sure.
    Hope this helps.
    lowdowndad
    Last edited by truckie453; 08-31-11 at 14:07.
    -Vinny

    The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because worth they believing in.

  8. #8
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    I am using a 20" rifle upper on a lower with a carbine receiver extension. It works fine
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  9. #9
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    Glad I'm not the only one, Thank you.

    Quote Originally Posted by MistWolf View Post
    I am using a 20" rifle upper on a lower with a carbine receiver extension. It works fine
    -Vinny

    The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because worth they believing in.

  10. #10
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    Yes to rifle upper on carbine lower but no rifle buffer or spring in carbine extension

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