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Thread: KAC SR-15 upper on Vltor A5?

  1. #41
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    Quote Originally Posted by phaseshift View Post
    I have a noveske lower with a5 buffer system with the current A5H2 buffer on my KAC SR15 14.5 Mod 2 upper, what A5 buffer is everyone currently using and found to be the best paired with KAC upper?
    My 11.5 & 14.5 run best with the A5H2 buffer & green sprinco springs. The A5H3 was a little much with the green spring for both combos.

  2. #42
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    Quote Originally Posted by PatrioticDisorder View Post
    My 11.5 & 14.5 run best with the A5H2 buffer & green sprinco springs. The A5H3 was a little much with the green spring for both combos.
    Did you find that your a5h2 and springco combo allowed you to use more kinds of ammo?

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    So is the main test whether it will lock open with pmc or similar ammo?

    And can someone explain the springco not locking back more, is it just stiffer and pushing back with more resistance? I had thought it was similar to a new mil spec spring but just lasted longer
    Last edited by JG007; 03-31-16 at 18:53. Reason: Second question

  4. #44
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    Quote Originally Posted by phaseshift View Post
    Did you find that your a5h2 and springco combo allowed you to use more kinds of ammo?
    Correct PMC bronze & other weaker .223 along with up to XM193 will run perfect suppressed & unsuppressed. I don't shoot Russian steel cased crap, no idea if it will run with that.

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    Quote Originally Posted by PatrioticDisorder View Post
    Correct PMC bronze & other weaker .223 along with up to XM193 will run perfect suppressed & unsuppressed. I don't shoot Russian steel cased crap, no idea if it will run with that.
    I shot wolf gold today, everything cycled fine but it never locked the bolt back after the last round. This is with the standard a5 setup. Shoots XM193 like a champ, what should I go A5H1

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    So the A5H1 with mil spec (not sprinco?) spring most closely matches the sr15? Both the 16 and 14.5?


    here is a similar thread

    https://www.m4carbine.net/showthread...-the-A5-system

  7. #47
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    Quote Originally Posted by JG007 View Post
    So the A5H1 with mil spec (not sprinco?) spring most closely matches the sr15? Both the 16 and 14.5?


    here is a similar thread

    https://www.m4carbine.net/showthread...-the-A5-system
    Well that makes sense because the buffer that comes with the 14.5 KAC SR15 MOD 2 weights in at ~4.62oz and the standard A5 buffer that comes with the system which is the A5h2 weights in at 5.03oz so the A5h1 is closest to the KAC buffer.

  8. #48
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    Quote Originally Posted by phaseshift View Post
    I shot wolf gold today, everything cycled fine but it never locked the bolt back after the last round. This is with the standard a5 setup. Shoots XM193 like a champ, what should I go A5H1
    That's what I would do if it were my rifle, sounds like the A5H1 would likely run everything perfectly.

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    Quote Originally Posted by PatrioticDisorder View Post
    That's what I would do if it were my rifle, sounds like the A5H1 would likely run everything perfectly.
    Can't find the h1 in stock anywhere, if I have another h2 can't I just take the weights out of it and make an h1? The only difference between the buffers is the weights inside right?

  10. #50
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    Quote Originally Posted by phaseshift View Post
    Can't find the h1 in stock anywhere, if I have another h2 can't I just take the weights out of it and make an h1? The only difference between the buffers is the weights inside right?

    http://www.weaponoutfitters.com/vltor-a5-buffers.html

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