Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

ar15 buffer question

Discussion in 'Rifle Country' started by greyling22, Apr 28, 2012.

Thread Status:
Not open for further replies.
  1. greyling22

    greyling22 Member

    Joined:
    Aug 6, 2007
    Messages:
    4,425
    Location:
    East Texas
    My ar is transforming. I'm swapping a midlength upper (lower had a carbine buffer tube) out for a RRA 20" predator upper (if it will ever ship). I have the regular carbine buffer and an h2 buffer. I'm trying to find out if the new upper will run on my existing lower/buffer combination.

    My google-fu gives me an answer of "it might work fine, you'll have to try and see" can anybody give a firm answer?
     
  2. Zerodefect

    Zerodefect Member

    Joined:
    Mar 28, 2009
    Messages:
    4,684
    Location:
    Yakutsk, Sakha Republic
    It'll work fine. But working fine deosn't mean it's correct. It's allways a good idea to do some tuning with buffer weights. You can get a H3 buffer and remove weights as needed.

    I'll let the others chime in on exactly what they use, I just experiment.

    Anyone have any recommendations for any carbine buffers for 18" rifle gas uppers as well?
     
  3. matrem

    matrem Member

    Joined:
    Jul 8, 2008
    Messages:
    1,611
    Location:
    Central Ohio
    I've ran 20" uppers on rifle buffers through H2 buffers with no problems.
    Havn't tried one with H3.(guessing it would work though)
    As mentioned , "tuning" the buffer weight to your rifle just makes the recoil easier to deal with.
     
  4. TonyAngel

    TonyAngel Member

    Joined:
    Feb 12, 2010
    Messages:
    2,735
    Just watch the ejection pattern. If it's throwing the brass forward (say a 2:00 position or farther forward) try a heavier buffer. If it's throwing the brass behind you (5:00 position or more) try a lighter buffer. You want about a 3 to 4:00 ejection.
     
  5. greyling22

    greyling22 Member

    Joined:
    Aug 6, 2007
    Messages:
    4,425
    Location:
    East Texas
    well that is really helpful tony. thanks.
     
  6. madcratebuilder

    madcratebuilder Member

    Joined:
    Jul 15, 2007
    Messages:
    5,020
    Location:
    Northern Orygun
    As you can see from this buffer weight chart the 20" rifle upper is designed to operate with a 5.6oz buffer.

    Rifle 5.2 oz
    Carbine 3.0 oz
    H buffer 3.8 oz
    H2 buffer 4.6 oz
    H3 buffer 5.6 oz
    ST-T2= 4.3oz.
    ST-T3= 5.4oz


    I have rifle uppers run fine with H and H2 buffers.
     
Thread Status:
Not open for further replies.

Share This Page