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Thread: Why SW MP15 use carbine buffer weight instead of H buffer

  1. #41
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    Stag Model 1 Buffer Option

    I just purchased a Stag Model 1. The action using M193 was much too violent for my tastes. It has a Car buffer and I ordered an H2 replacement buffer. Is this a good choice???

    Also, the extraction from this rifle was very weak. They are sending me a new spring/extractor, but I ordered a Wolff X4 spring to install instead. I mean the rounds just dribbled out. I can move the extractor with ease just using my fingers. My RRA rifles have a tighter extractor and it takes significant force to move it.

    This thread has been most helpful and interesting. Please chime in guys and educate me on these issues. Thanks in advance.

    Best,
    Jason

  2. #42
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    Quote Originally Posted by hammonje View Post
    I just purchased a Stag Model 1. The action using M193 was much too violent for my tastes. It has a Car buffer and I ordered an H2 replacement buffer. Is this a good choice???

    Also, the extraction from this rifle was very weak. They are sending me a new spring/extractor, but I ordered a Wolff X4 spring to install instead. I mean the rounds just dribbled out. I can move the extractor with ease just using my fingers. My RRA rifles have a tighter extractor and it takes significant force to move it.

    This thread has been most helpful and interesting. Please chime in guys and educate me on these issues. Thanks in advance.

    Best,
    Jason
    Yes, on the H2. Look at the BCM extractor upgrade kit.

    C4

  3. #43
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    Thanks...I was hoping you would chime in. What is the difference between the Wolff spring and the BCM kit???? I saw it had a five coil spring, insert, and o-ring. I think I will install the Wolff spring and if that doesn't cut it I will get the BCM kit.

    Thanks again.

  4. #44
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    Quote Originally Posted by hammonje View Post
    Thanks...I was hoping you would chime in. What is the difference between the Wolff spring and the BCM kit???? I saw it had a five coil spring, insert, and o-ring. I think I will install the Wolff spring and if that doesn't cut it I will get the BCM kit.

    Thanks again.
    Wolff springs are just SS. BCM's are CM. This means that you will get a much longer life span out of them.


    C4

  5. #45
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    I've got the Stag model 2 and have been running a 9mm buffer since this past winter. Before that I had a H2 in it for about 2 years. I run mostly Wolf 55gr for practice ammo and have never had a problem even down to below freezing temperatures. Your H2 buffer should be perfect for you. David
    Last edited by dwhitehorne; 07-06-09 at 16:23.

  6. #46
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    I followed Grant's advice and tried a "H" and then a "H2" buffer in my M&P15x, it was ejecting the casings at 1-2 o'clock and was slamming back hard. But now I am using the "H2" buffer and even the crappy Wolf ejects to 3-4 o'clock and the rifle seems much smoother.
    Thanks Grant.
    "A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government."
    - George Washington

    "Some of you would bitch if a hot blonde served you a perfect steak and beer of choice while naked and performed acts not described." Mark5pt56

  7. #47
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    So what's the best buffer to have then for the M&P? I have a 15T that I am running 55-65Gr 5.56 NATO rounds through. H buffer needed? H2? Is Colt running an H buffer in their M4's? Thanks.

  8. #48
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    Quote Originally Posted by C4IGrant View Post
    In a S&W AR, I would actually use an H2 buffer. This will soften felt recoil and slow your bolt speed (making the weapon more reliable).


    C4
    Just ordered one from Grant for my M&P-15.

  9. #49
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    What is the downside to leaving the carbine buffer alone? If the rifle is 100% reliable what's the reason to change it? What specifically can happen? Will the receiver crack or something? Is ther any answer besides "the gun gets battered"? I see reliabilty given as an answer but if the rifle is already reliable, again what's the point? Thanks!

  10. #50
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    Quote Originally Posted by steeltoe View Post
    What is the downside to leaving the carbine buffer alone? If the rifle is 100% reliable what's the reason to change it? What specifically can happen? Will the receiver crack or something? Is ther any answer besides "the gun gets battered"? I see reliabilty given as an answer but if the rifle is already reliable, again what's the point? Thanks!
    Could be no downside. Hard to say for certain. What the heavier buffer is doing is slowing things down and reducing felt recoil. The slow bolt speed will increase extraction as well (making the weapon more reliable).

    Colt (for example) uses a gas port size of .063. The S&W AR has a gas port in the .075-.078 range. Colt has figured out that an H buffer works best with their gas port size. So if an H works well in a .063, then H2 will give a similar effect in an AR with a larger gas port.

    Just because a manufacturer ships you a gun in a certain configuration, does not always mean that it is the best setup. Most times, the manufacturer is looking at the bottom line.



    C4

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