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Thread: The VLTOR A5 thread - what doesn't it work with?

  1. #11
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    Most configurations will run with just an H buffer.

    However, the A5 will not only run, but it is extremely consistent with different loads.

    Whereas with standard buffers you will see the ejection change and feel the cycle change with hotter and weaker loads, with the A5 it seems much less sensitive to this and seems to cycle about the same no matter what.

    Quote Originally Posted by samuse View Post
    Will any of those not run with a carbine spring and H or H2 buffer?
    Last edited by Clint; 01-17-15 at 22:47.
    Black River Tactical
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  2. #12
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    Let's say I'm playing devils advocate, as I know the A5 has a wider array of function. The H2 carbine can induce less wobble and 100% reliability or an intended load that runs 100% for an intended use.
    What would the A5 offer?
    Does the margin of reliability counter the reduction in wobble that the carbine action system could offer? The argument has been made that the that the carbine H2 would be the choice for faster engagements over the A5 type of system. Not saying that proper "follow through" was done incorrect.

  3. #13
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    16" bcm standard barrel midlength suppressed part time with saker 556, wondering if it's worth buying a heavier buffer and if so witch one?

    A5 is on suppressed bcm 11.5

  4. #14
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    Ive been thinking about using the Vltor A5 system on a 14.5 inch carbine gassed setup (bcm upper). I see that most people are saying the A5 is good to go on most all properly configured uppers, but I feel compelled to ask, can anyone anticipate any issues with the aforementioned setup? Not at all new to the AR platform, but Im totally new to the A5 system. What is the difference between the RE-A5 and the RE-10/A5SR? one is six position and one is 7 position, but beyond that, is there any functional difference between the two? To further complicate things, I was perusing bcm's website and I noticed they are selling the BCM intermediate receiver extension. It looks like its just a vltor A5, but it is an 8 position receiver extension. What is that? Is there a functional difference between the bcm/vltor intermediate RE (8 position) and the vltor 7 position A5? I did use the search function, but I didn't see anything addressing this. Thanks for any help!

  5. #15
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    All of my lowers have the A5 system with the A5H2 buffer. They have all run 100% with 223 and 5.56.

    14.5 carbine gas
    16" carbine gas
    16" mid-length gas
    18" intermediate gas
    18" rifle gas

  6. #16
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    My BCM 20" rifle and 14.5" middy both run great with green Sprinco and standard A5H2 buffer. I've run my 14.5" middy upper on that lower enough to trust it. It cycles fine and locks back every time. The weakest ammo I use is brass .223. This morning was a mix of Fed XM855, Fed XM193 and Fed American Eagle .223. Flawless through both uppers. Honestly, the 20" upper felt more sluggish with the .223 than did the "ultra-picky-ammo-sensitive-finicky-unreliable" 14.5" middy. Anyway, my small sample of two.

    ETA: My buddy's BCM 14.5" carbine upper ran great on my A5 lower also.
    "A warranty and a carry bag are not bullet points for "Milspec+" to anyone who doesn't lick windows." - Tiny Killer Robot

  7. #17
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    Quote Originally Posted by tom12.7 View Post
    Let's say I'm playing devils advocate, as I know the A5 has a wider array of function. The H2 carbine can induce less wobble and 100% reliability or an intended load that runs 100% for an intended use.
    What would the A5 offer?
    Does the margin of reliability counter the reduction in wobble that the carbine action system could offer? The argument has been made that the that the carbine H2 would be the choice for faster engagements over the A5 type of system. Not saying that proper "follow through" was done incorrect.
    That's kinda what I'm getting at. IMO, the A5 does make a lot of sense and is a better mousetrap theoretically.

    But in reality, I've seen a BUNCH of ARs from 10.3-20" all run fine on carbine springs and H-H3 buffers. When a gun doesn't run, it's almost NEVER fixed with a rifle spring and buffer. Unless you're playing with some bottom-end junker.

  8. #18
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    I do run them like many of you. But I decided to try and not completely rebuild a wonderfully built LMT 10.5. Just changed h buffers to heavy. We all do overkill to build a better mousetrap. It's part of the deal, but the A5 is good kit for sure.
    "Air Force / Policeman / Fireman / Man of God / Friend of mine / R.I.P. Steve Lamy"

  9. #19
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    I assume by "wobble" you mean "muzzle dip" upon return to battery.

    The CAR H3 is equal in weight to the std A5H2 ~5.4 oz

    The CAR H2 is equal in weight to the A5H1 ~4.6 oz

    The CAR H is equal in weight to the A5H0 ~3.8 oz


    If muzzle dip is a concern, the A5 can cover the same total weight as the useful CAR buffers.

    Part of the equation is spring strength.

    An H2 with extra power spring may impact harder than an A5 with more weight and a softer spring.


    Quote Originally Posted by tom12.7 View Post
    Let's say I'm playing devils advocate, as I know the A5 has a wider array of function. The H2 carbine can induce less wobble and 100% reliability or an intended load that runs 100% for an intended use.
    What would the A5 offer?
    Does the margin of reliability counter the reduction in wobble that the carbine action system could offer? The argument has been made that the that the carbine H2 would be the choice for faster engagements over the A5 type of system. Not saying that proper "follow through" was done incorrect.
    Black River Tactical
    BRT OPTIMUM HFCL Barrels - Hammer Forged Chrome Lined 11.5", 12.5", 14.5"
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 12.5" MRC, 11.5" CQB, 9" PDW
    BRT EZTUNE Preset Gas Tubes - CAR and MID
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
    BRT MicroPin Gas Blocks - .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  10. #20
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    Quote Originally Posted by Clint View Post
    I assume by "wobble" you mean "muzzle dip" upon return to battery.

    The CAR H3 is equal in weight to the std A5H2 ~5.4 oz

    The CAR H2 is equal in weight to the A5H1 ~4.6 oz

    The CAR H is equal in weight to the A5H0 ~3.8 oz


    If muzzle dip is a concern, the A5 can cover the same total weight as the useful CAR buffers.

    Part of the equation is spring strength.

    An H2 with extra power spring may impact harder than an A5 with more weight and a softer spring.
    Clint, you can change the "may" in your last sentence to "does". I verified that through extensive experimentation with car buffers and springs.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

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