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Thread: What A5 buffer weights for this list of guns?

  1. #41
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    Quote Originally Posted by MrSmitty View Post
    The "-" is what confused me. I've never seen the other buffers, only the standard one, I didn't know how they were marked.


    I've been running a Noveske 10.5" switchblock upper w/ A5H4, Sprinco green spring, and LMT enhanced carrier since August. Exceptionally light recoil but doesn't feel too sluggish. Cycles XM193, MK318, FBIT3, MK262, Prvi, ADI, AE223, Tula, Wolf, and various reloads without issue, even when filthy. Difference in recoil is almost unnoticeable between 5.56 and .223 loads which I really like.

    Some batches of PMC Bronze have short stroked like gangbusters though. I swap down to an A5H3 if I have a shit ton of that and it cycles fine.


    ETA: Can you buy the H0 and H1 variants?......Nevermind, answered my own question...I didn't realize they were available commercially...
    It's already been stated (tho not sure if in this thread) that the Vltor A5 buffer uses std buffer weights of steel and tungsten with the exception of the weight adjacent to the Delrin tip (with has a machined "cup" that seats the silencing spring). So, you can break open any carbine buffer and swap the tungsten and steel weights. All you need is a hammer and a 2mm starter punch to get the drift pin moving and a 3mm straight punch to move it all of the way out. Grab the delrin tip with some pliers and pull. Boom. You can make any variation of the Vltor buffer except the H4 (which has a tungsten weight with the machined cup that only comes with the H4).
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

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  2. #42
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    Quote Originally Posted by BufordTJustice View Post
    It's already been stated (tho not sure if in this thread) that the Vltor A5 buffer uses std buffer weights of steel and tungsten with the exception of the weight adjacent to the Delrin tip (with has a machined "cup" that seats the silencing spring). So, you can break open any carbine buffer and swap the tungsten and steel weights. All you need is a hammer and a 2mm starter punch to get the drift pin moving and a 3mm straight punch to move it all of the way out. Grab the delrin tip with some pliers and pull. Boom. You can make any variation of the Vltor buffer except the H4 (which has a tungsten weight with the machined cup that only comes with the H4).
    I just wasn't aware you could buy the H0/H1, I don't remember ever seeing it before. I turned my H2 into an H3/H4 with and carbine H2 I had laying around. The spring can be taken out of the A5 buffer if you want to toss a 4th tungsten weight in there. It's more or less there to keep the buffer quiet, no functional impact. I drilled a small cup in the buffer tip so I could still use it. One thing I did notice is that a tip from another buffer wouldn't fit on my A5, the hole would not line up. May have been the other buffer though, it was a gunshow special....

    ETA: Here's the response I got regarding the spring:

    Quote Originally Posted by Eric S. Kincel
    It will function perfectly without the spring. The spring silences the extra travel we added inside the buffer. Both the extra travel and the spring are patent pending.
    At one point Vltor told me in an email that they use the same weights that Colt uses in their buffers but I can't find it right now.
    Last edited by MrSmitty; 02-22-13 at 18:50.

  3. #43
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    What buffer would be good for a DD 14.5 middy and a DD 16 inch middy? My next build will be a DD 16 inch barrel unless I find a BCM 16 middy for a good price.

  4. #44
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    Quote Originally Posted by Kenneth View Post
    What buffer would be good for a DD 14.5 middy and a DD 16 inch middy? My next build will be a DD 16 inch barrel unless I find a BCM 16 middy for a good price.
    New build so not that many rounds out the front but I have been running a DD 14.5" middy (w/.076 gas port) with an A5H2 and green springco spring and it runs everything so far reliably. Up to the weakest ammo I shoot which is PMC .223 Bronze.

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  5. #45
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    Quote Originally Posted by MrSmitty View Post
    I just wasn't aware you could buy the H0/H1, I don't remember ever seeing it before. I turned my H2 into an H3/H4 with and carbine H2 I had laying around. The spring can be taken out of the A5 buffer if you want to toss a 4th tungsten weight in there. It's more or less there to keep the buffer quiet, no functional impact. I drilled a small cup in the buffer tip so I could still use it. One thing I did notice is that a tip from another buffer wouldn't fit on my A5, the hole would not line up. May have been the other buffer though, it was a gunshow special....

    ETA: Here's the response I got regarding the spring:



    At one point Vltor told me in an email that they use the same weights that Colt uses in their buffers but I can't find it right now.
    Well, the spring does a little more than nothing.

    A normal buffer that is in-battery has weights inside that could be resting at any point within the free-travel area of the interior of the buffer. This means that it is possible that, during firing, the bolt could begin to unlock and ONLY encounter the mass of the buffer body, which is aluminum (weighs ~.4oz) for the first 1/4" of travel of the bolt carrier group.

    This means that during the critical unlocking phase, the bolt and carrier could accelerate to the rear MUCH too quickly and unlock too soon since virtually zero resistance is offered by the buffer. The additional problem here is that, in a normal buffer this effect is unpredictable.

    The "silencing spring" in the A5 buffer is not an accident and is not there purely to quiet the mechanism, though it certainly has that effect. It is also there so that the full mass of the buffer assembly is presented to the rear of the bolt carrier while it is in battery, thereby offering CONSISTENT resistance during the unlocking phase of the bolt carrier group and guaranteeing that the BCG doesn't see only the mass of the buffer body (which might as well be just air).

    I have also seen this have the effect of stabilizing the cyclic rate when shooting strings of full auto.

    It's science.
    Last edited by BufordTJustice; 02-22-13 at 20:05.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

  6. #46
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    Had a SR-15 CQB running A5 RE, A5H3 buffer, Springco Green spring, LMT enhanced carrier... ran 100% this was with a mixture of ammo, suppressed and not. Currently I have a 14.5" SR-15 Carbine gun setup the exact same way with a pinned & welded BCM Mod 1 comp... zero rounds through this gun so far... I am looking forward to shooting with two other M4C members that are in Georgia (cough, mtdawg169, cough) and I will verify this setup runs 100% on KAC's flavor of 14.5.
    Last edited by E-man930; 02-22-13 at 20:19.

  7. #47
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    This is an excellent description of the A5 system.

    This is also the reason that it can be more reliable than the CAR or rifle buffers.

    Quote Originally Posted by BufordTJustice View Post
    Well, the spring does a little more than nothing.

    A normal buffer that is in-battery has weights inside that could be resting at any point within the free-travel area of the interior of the buffer. This means that it is possible that, during firing, the bolt could begin to unlock and ONLY encounter the mass of the buffer body, which is aluminum (weighs ~.4oz) for the first 1/4" of travel of the bolt carrier group.

    This means that during the critical unlocking phase, the bolt and carrier could accelerate to the rear MUCH too quickly and unlock too soon since virtually zero resistance is offered by the buffer. The additional problem here is that, in a normal buffer this effect is unpredictable.

    The "silencing spring" in the A5 buffer is not an accident and is not there purely to quiet the mechanism, though it certainly has that effect. It is also there so that the full mass of the buffer assembly is presented to the rear of the bolt carrier while it is in battery, thereby offering CONSISTENT resistance during the unlocking phase of the bolt carrier group and guaranteeing that the BCG doesn't see only the mass of the buffer body (which might as well be just air).

    I have also seen this have the effect of stabilizing the cyclic rate when shooting strings of full auto.

    It's science.
    Black River Tactical
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  8. #48
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    Re: What A5 buffer weights for this list of guns?

    Quote Originally Posted by Clint View Post
    This is an excellent description of the A5 system.

    This is also the reason that it can be more reliable than the CAR or rifle buffers.
    Thank you, sir.

    Sent from my SPH-D710 using Tapatalk 2
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

  9. #49
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    Does anybody know where to get a h3 or h4 buffer? I can't find them anywhere.

  10. #50
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    I rolled my own H3s out of VLTOR A5H2s that come with the kit using a spare BCM H3 buffer.
    If you have to go heavier you will need to source the H4 as mentioned in the thread.
    Last edited by E-man930; 02-23-13 at 09:48.

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