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Thread: Basic Question: Does a Rifle Length Gas System Need a Rifle Length Buffer Tube?

  1. #11
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    Quote Originally Posted by R.A.N.G.E.R View Post
    If they’re not using tungsten, but the actual buffers are the same size (C = H1 = H2 = H3 (size)), then do heavier buffers use lead for weights instead of steel?
    Carbine buffers are all the same size, but different weights. The H number represents how many steel buffer weights are replaced by tungsten weights - a H2 buffer has 2 tungsten weights and one steel weight.

    Rifle buffers are much longer and use steel weights and an aluminum spacer. Generally speaking, rifle buffers are approximately 5.2 ounces and there are no "H" rifle buffers.

  2. #12
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    Quote Originally Posted by AndyLate View Post
    Carbine buffers are all the same size, but different weights. The H number represents how many steel buffer weights are replaced by tungsten weights - a H2 buffer has 2 tungsten weights and one steel weight.

    Rifle buffers are much longer and use steel weights and an aluminum spacer. Generally speaking, rifle buffers are approximately 5.2 ounces and there are no "H" rifle buffers.

    Great info, really fills in the gaps, thanks!

  3. #13
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    This is good rule of thumb info, but ultimately going to depend on gas port size. If you have a rifle that is under-gassed a heavier buffer is going to cause problems. There are also different gas tubes on the market now that have different internal diameters which can also cause gremlins.

    Here is a reference table for gas port sizing--there is no way to tell this info without removing gas block/FSP.

    http://www.tacticalmachining.com/lea...ort-sizes.html

  4. #14
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    If you run a carbine RE, then I believe the correct weight buffer would be an H6, however I have yet to find a reliable source for one. My suggestion based on first hand experience, would be to run a Vltor A5 system. I equipped my last rifle length gun with an A5 system, and it ran as smooth as silk. It also ate every type of ammo I gave it, so I would not hesitate to use it again.

  5. #15
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    H6 buffer thread for reference:

    https://www.m4carbine.net/showthread...7657-H6-Buffer

    Damage Industries sells the H6 buffer.

    Andy
    Last edited by AndyLate; 02-06-19 at 20:05.

  6. #16
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    Quote Originally Posted by AndyLate View Post
    H6 buffer thread for reference:

    https://www.m4carbine.net/showthread...7657-H6-Buffer

    Damage Industries sells the H6 buffer.

    Andy
    The Damage industries H6 is what I run. Prior to that I ran an H2 with no problems either.

    18" SPR with rifle gas.
    Last edited by B52U; 02-06-19 at 20:29.

  7. #17
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    Here is this thread on rifle plus carbine RE

    https://www.m4carbine.net/showthread...-buffer-spring

  8. #18
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    Quote Originally Posted by Circle_10 View Post
    The Canadians use such a configuration as their C7A2 service rifle. IIRC it uses an H3 buffer or equivalent.

    Someone will probably recommend the Vltor A5 kit as well. I can't recommend it from any first-hand experience, but I seem to recall that it was designed with a 20" barreled rifle in mind.
    The A5 buffer is close to the same length as a rifle buffer minus the fixed spacer.
    Last edited by Toyoland66; 02-06-19 at 21:25.

  9. #19
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    This has come up several times. I have built a few rifles for guys locally using correctly gassed 20" barrels, Sprinco blue springs and an H3 buffer. They ran perfectly fine.



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  10. #20
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    Quote Originally Posted by Toyoland66 View Post
    The A5 buffer is close to the same length as a rifle buffer minus the fixed spacer.
    That portion of the rifle buffer is about a half inch longer than the A5 buffer.
    The number of folks on my Full Of Shit list grows everyday

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