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Thread: Vltor A5 EMOD on a 14.5" middy???

  1. #1
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    Vltor A5 EMOD on a 14.5" middy???

    I'm going to be ordering the parts to build my AR this weekend. The upper I'm geting is a 14.5" with a mid-length gas system and I was originally going with a milspec carbine receiver extention and an H2 buffer. But I was looking around and found the EMOD by Vltor and it seems like the performance of it is pretty good compared to the A2 stock but that's on a rifle length gas system and a 20" barrel. Does anybody have experience with or know how this system would perform on a mid-length gas system and a 14.5" barrel?

    Thanks.

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    "I have your number. Consider yourself warned."

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    The EMOD is just a stock, the A5 is the receiver extension. There are numerous threads about it's performance with various set ups.

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    I did a search for something on this but couldn't find anything. Thanks for the link though, it really helps.

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    Iraqgunz and I were at Vltor a few weeks back. In order to use the A5 on a 14.5 middy, you need to run the lighter buffer.

    Pretty much every other AR runs perfect with an A5.

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    Lighter buffer being the H2 or stock 5oz A5?

    I'm using an A5 on a 16" with an intermediate gas system. With the A5H3 buffer, I had one fail to lock on empty. No problems with the stock A5 buffer. Mag was a 20 round PMAG, no BAD lever or anything like that.

  7. #7
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    Quote Originally Posted by markm View Post
    Iraqgunz and I were at Vltor a few weeks back. In order to use the A5 on a 14.5 middy, you need to run the lighter buffer.
    So which buffer do I need to get? I'm ordering all my stuff from BCM.
    Last edited by USNsheepdog; 03-12-11 at 15:47.

  8. #8
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    Quote Originally Posted by USNsheepdog View Post
    So which buffer do I need to get? I'm ordering all my stuff from BCM.
    To someone's earlier post, it may depend on your setup. Let me first say that VLTOR's support for their products is fantastic and they've help me through my A5 adoption. With that said, the A5 buffer & tube did not work well on my 14.5 Mid Length (DD) reliably with the default A5 buffer. There just wasn't enough gas to cycle effectively and it short-stroked every 4th round or so.

    Using an A5 and a spare Carbine buffer, the folks at VLTOR walked me through various configs until I found the one that worked for me. This involved basically dis-assembling the A5 buffer to reduce weight until I had the right setup, very easy to do.

    The A5 starts with 4 weights inside, 2 Steel and 2 Tungsten. Here are some reference configs (using my postal scale, so your weights may vary):
    A5 Buffer: 5.3oz
    A5 Mod1: 4.5 oz (3 steel + 1 tungsten)
    ST-T2: 3.9 oz (reference point, haven't tried this with an A5 buffer)
    A5 Mod2: 3.6 oz (4 steel)
    Carbine: 2.9 oz

    Basically, just swapped out the weights from the Carbine buffer to the A5. With 'Mod1' above, it was much better and only short-stroked once in about 70 rounds. Mod2, 4 steel weights, was the sweet-spot for my 14.5 Mid and it now functions flawlessly.

    I've got a local 3 gun event in a couple of weeks, but after that I may try increasing weight (Spikes or Mod1 of the A5 above) and see what I get.

    Hope this helps. Again, I like the A5 and I'm sticking with it, VLTOR are great to deal with for customer support, so buy with confidence if you are leaning towards the A5.

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    ^ thanks for posting that. That may very well come in handy on my 14.5" build. I figured since both my SR15's run fine with it, a 14.5" Middy would too, but maybe not.

  10. #10
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    What ammo are you using with your 14.5" DD mid-length?

    If I had to put that much work into making the A5 function, I would ditch it.
    Last edited by bp7178; 03-12-11 at 17:16.

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