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Thread: Knight's Armament SR-15 E3 Legacy 16" & SR-15 E3 CQB SBR 11.5" malfunction suppressed

  1. #51
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    About time you tested your damn gun!
    Hopefully IraqGuns will be by to chime in.

  2. #52
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    Quote Originally Posted by gabuzz12 View Post
    Well guys....

    I haven't posted in this thread since Eman930 and I had our initial problems with the malfunctions using the factory KAC SR15 rifles and our AAC 762SDN6 suppressors. Eman930 has fixed his problems; HOWEVER, I can't seem to get my rifle up to speed. Using the advice of other members, I have installed the Vltor A5 system and a Springco "green" rifle spring. Here's goes my frustrating effort to fix this over-gassed issue:

    Please keep in mind all ammo used during this test was Federal XM193.

    Step 1:

    I installed the Vltor A5 System and used the stock weight buffer and Springco spring. I went to the range....fired approximately 35 rounds....and cursed uncontrollably as I had three malfunctions...all stovepipes. I can say that the A5 system caused the ejection angle of the brass to be more consistant at approximately 2:30.

    Step 2:

    In an attempt to increase the buffer weight to get the rifle to cycle properly, I added one additional tungsten weight and removed one steel weight. I (again) went to the range...fired approximately 35 rounds...and cursed uncontrollably as I had multiple malfunctions.

    Step 3: (Today's Range Trip)

    I added an additional tungsten buffer weight....now all the weights in the buffer are tungsten. I (again) went to the range...fired approximately 35 rounds...and cursed uncontrollably as I had multiple malfunctions.

    At this point, I am at my wits end with this KAC SR15! When Eman930 originally posted this thread, we were contacted by KAC, who promised new ejectors and springs. THESE NEVER CAME!! After multiple attempts at trying to get this person to send the parts....we gave up and tried to fix things on our own with the A5 system.

    My opinion is that I must have a barrel with a gas hole the size of a sewer pipe! I assume in KAC's attempt to satisfy the general public with their rifle's ability to cycle junk ammo, they have obviously ignored more of the higher-end user, which I was under the impression that the company catered to when I purchased my KAC products.

    I am beyond pissed at this point and am considering parting with all my KAC rifles because their products don't do what they claim. When I pay such a premium for products....I except them to work flawlessly without exception.

    Well guys....can you think of anything for me to try??? I'm all out of options...at least that I can think of. I would appreciate any help/comments that you can provide.
    Who did you talk to at KAC?
    You can PM me if you don't want to talk about it publicly.

    Typos brought to you via Tapatalk and autocorrect.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  3. #53
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    A few thoughts....

    It can be difficult to troubleshoot especially when people are modifying and dicking with stuff.

    As far as I know the ports on the KAC SR-15 aren't that great. In fact, there are plenty of other carbines that have ports that are at least that large and larger and they seem to run.

    I am curious as to why you dissected a Vltor buffer rather than just getting the correct weight. I would be running the Vltor H4 buffer.

    Does the KAC bolt use proprietary ejector and extractor springs?



    Owner/Instructor at Semper Paratus Arms

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  4. #54
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    IG,

    I think the ejector spring is non-proprietary but the extractor springs are... I swapped in tungsten weights in my buffer as well since I had an (now obsolete) H3 BCM buffer; its cheaper than buying a new VLTOR H3 or H4. From what I read, gabuzz has all 4 weights as tungsten and his gun is still cycling cheap ass ammo without the suppressor fine. I would have thought it wouldn't pick up the next round with that amount of weight.

    Thoughts?
    Last edited by E-man930; 11-02-12 at 23:16.

  5. #55
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    I would probably go ahead and replace the ejector spring first. Then I would retest and see what happens. It doesn't sound like an extractor issue to me.

    What is the round count on this thing?

    Quote Originally Posted by E-man930 View Post
    IG,

    I think the ejector spring is non-proprietary but the extractor springs are... I swapped in tungsten weights in my buffer as well since I had a (now obsolete) H3 BCM buffer; its cheaper than buying a new VLTOR H3 or H4. From what I read, gabuzz has all 4 weights as tungsten and his gun is still cycling cheap ass ammo fine. I would have thought it wouldn't pick up the next round with that amount of weight.

    Thoughts?



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

  6. #56
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    I forgot to mention that I'm still a little pissed that I bought a $1650 upper, an upper mind you, that was touted as running well suppressed and then I go to use it and it ****ing chokes up shooting 5.56 mil-spec ammo suppressed...? Are you kidding me? And then to know they make a nice 11.5" mil barrel with the smaller port, proper strength to weight profile,and is dimpled behind the gas block to save weight (instead of the retarded Gov't profile I ended up with) but they won't sell it to me? What??? However, 50 guys called "Original Gansters" can buy them because they bitched and griped to KAC years ago and got a special run going for them but you're screwed if you are not part of the original 50 if you want to buy this stuff... WTF? Now you have me upset that I had to spend money on my setup to make it run well because my "commercial" spec barrel is made for a wide range of idiots to use rather than dropping in a warning card that states only 5.56 mil-spec ammo should be used in this gun for it to function reliably and let the morons be morons.
    Last edited by E-man930; 11-02-12 at 23:50.

  7. #57
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    IG,

    Round count is approximately 500 on my sr15

  8. #58
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    I totally did not expect this to happen from a super high end upper...sorry to hear about yours troubles....is it only giving you troubles suppressed or both?

  9. #59
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    Lightbulb

    Did you read the thread???

  10. #60
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    My advice is to reach out to KAC rep here and see about sending the upper in for examination. 500 rounds is nothing.

    Quote Originally Posted by gabuzz12 View Post
    IG,

    Round count is approximately 500 on my sr15



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

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