300 BLK 9" barrel, which buffer to use?

Discussion in 'AR-15 Discussion' started by truevil1313, May 16, 2014.

  1. truevil1313

    truevil1313 New Member

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    I am doing a 300 BLK build and have submitted my form 1 to the ATF. I will be putting a 9" barrel with a pistol gas system on it. I was wondering if a regular carbine buffer is good enough or do I have to use the H2 buffer? What are your thoughts?
     
  2. purehavoc

    purehavoc New Member

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    You wont know until you try it is what I have found out . I build my own weights for my buffers to work what that particular upper
     

  3. KingTiger

    KingTiger Member

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    I've run a H2 in my 9.5" 300 BLK since the get go.

    Some people start off running a standard carbine buffer for break-in to make sure every thing functions & it locks back after the last round, then switch to a H2.

    [​IMG]
     
  4. toddchaney

    toddchaney New Member

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    I think regular would do.
     
  5. truevil1313

    truevil1313 New Member

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    A little more research and I was able to answer my own question. This is from AAC's website.

    IMPORTANT NOTES:
    -The 9" and 12.5" AAC 300BLK Uppers are designed for use with a carbine receiver extension, standard GI Buffer Spring, and an H2 Buffer.