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Thread: Vltor A5 not working in my M16.

  1. #21
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    Dude, that MGI spring is 2X, DOUBLE FORCE!

    I have one but I only use it for troubleshooting over-gassed conditions as it makes manupilations a bitch. It WILL increase the forward velocity of the bolt and make it more likely to bounce.

    It is meant to be used only with the carbine length MGI Rate Reducing Buffer too.

    One thing is certain, if you are getting full cycle with the MGI spring, you are over-gassed.

    Plus, the MGI spring is a carbine and not a rifle spring.


    PS, make sure you do not put carbine-length buffers in that A5 tube, you can damage your lower reciever.

    You need to be using a standard rifle spring and not a carbine spring with the A5.
    Last edited by Heavy Metal; 02-26-11 at 12:56.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  2. #22
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    Quote Originally Posted by Dano5326 View Post
    Or you cycle the action, cocking the hammer and start the cycle of operations again?
    This. With live round in chamber.


    Quote Originally Posted by Dano5326 View Post
    On auto, most likely reason (if the weapon has NO issues in semi) if your hammer is forward on a live rd = bolt bounce
    Bolt bounce usually remedied by upping buffer weight.

    I get that, what I dont get is why it is working perfectly with the H3/ 5oz rifle buffer, but not with the 5oz A5.


    Quote Originally Posted by Dano5326 View Post
    What do you want to sell the A5 buffer/tube/spring for, and which buffer weight do you have?
    If I get rid of it, I think I would just try to trade it for a normal carbine tube and a H3 buffer.
    Last edited by RustedAce; 02-26-11 at 14:14.

  3. #23
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    Quote Originally Posted by Heavy Metal View Post
    Dude, that MGI spring is 2X, DOUBLE FORCE!

    I have one but I only use it for troubleshooting over-gassed conditions as it makes manupilations a bitch. It WILL increase the forward velocity of the bolt and make it more likely to bounce.

    It is meant to be used only with the carbine length MGI Rate Reducing Buffer too.

    One thing is certain, if you are getting full cycle with the MGI spring, you are over-gassed.

    Plus, the MGI spring is a carbine and not a rifle spring.


    PS, make sure you do not put carbine-length buffers in that A5 tube, you can damage your lower reciever.

    You need to be using a standard rifle spring and not a carbine spring with the A5.


    I used a colt rifle length, and the vltor rifle length springs, both with no success first, then figured screw it I will try the MGI.


    I took the A5 buffer tube off and put the regular one back on to use the H3
    Last edited by RustedAce; 02-26-11 at 13:09.

  4. #24
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    You could try a heavier A5 buffer before giving up.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  5. #25
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    Just received my A5 yesterday.

    I noticed the buffer weights don't shake freely the same as standard buffers do.

    There appears to be a spring inside the A5 buffer that holds the weights forward.

    When tapping/hammering the head on something, it sounds/feels pretty solid.

    When tapping/hammering the tail on something, it sounds/feels very springy.

    I can't help but thinking this may be partly at fault for the bolt bounce.

    Can any of you with well working A5s confirm that the weights are biased forward rather than rearward in theirs?
    Last edited by Clint; 02-26-11 at 22:33.
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  6. #26
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    Quote Originally Posted by Clint View Post
    I can't help but thinking this may be partly at fault for the bolt bounce.
    That's why you remove the spring.

  7. #27
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    I asked the question about the spring the the large A5 thread but no one seemed to know for sure. On both of mine the spring is between the plastic/rubber piece and the last weight. I does seem that location of the spring would hinder the free floating weights from stopping bolt bouce. I took my springs out just because there is no spring present on the original design and I have not heard the argument for its presense. I did notice the buffer was very noisy with the spring removed. Perhaps that's why its there? I solved that by disassembling it again and very lightly coating everything with Slip2000EWL.

    If you want to try a heiver buffer without paying for one you can disassemble both your H3 and A5 buffers and refill the A5 with 3-4 tungsten weights. 3 tunsten and 1 steel will be an A5H3 and 4 tungsten will be an A5H4. No need buy a new one. They can be a little hard to disassemble the first time they are done but when I reassemble I put a little Slip2000EWL on the plastic part as well and the next time its much easier to take apart.

    To disassemble I use a 1/8" roll pin punch to take out the roll pin. You can use a regular 1/8" punch but the roll pin punch makes it easier. I put a little Slip2000EWL on the roll pin before starting to help. After the roll pin is out I take a regular 1/8" punch(since it is make from solid stock unlike my roll pin punch) and insert it very slightly into the hole and use it to pry the plastic piece away from the buffer body. You only get a little bit of seperation. With that little bit of seperation I put a standard screw driver in between the plastic and the buffer body and use the screwdriver to lever a little more seperation. Then I use a pair of slip joint pliers to wiggle the plastic part out. With this method I find disassembly to be reletivly easy and there is no damage to the buffer body or plastic piece.

    On reassembly all you have to be careful of is aligning the hole correctly and cinching down on the roll pin when you drive it in (lub helps here as well). Mimic the placement of weights and spacers on reassembly.

    If you don't want to mess with disassembling your buffers and decide to sell your A5 kit I will gladly trade you a LMT CAR RE (the one that comes with the SOPMOD and has the anti friction coating), BCM H3 buffer, and spring of choice for your A5 kit.
    Last edited by Neo Mara; 02-26-11 at 15:36.

  8. #28
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    Wow man, sorry to hear about the problems.

    IM inbound, lets get this fixed.

  9. #29
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    Quote Originally Posted by BSWilson View Post
    Wow man, sorry to hear about the problems.

    IM inbound, lets get this fixed.
    Email sent.

    Thanks!

  10. #30
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    Quote Originally Posted by Neo Mara View Post
    ...does seem that location of the spring would hinder the free floating weights from stopping bolt bouce. I took my springs out just because there is no spring present on the original design and I have not heard the argument for its presense.
    The force needed to compress that spring is tiny compared to the force of the weights at the velocity the buffer travels.

    I'd say it's so the weights start from the same position shooting with the muzzle up or down.

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