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Thread: KAC SR-15 E3

  1. #11
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    Quote Originally Posted by DreadPirateMoyer View Post
    With regards to the trigger, I prefer an SSA. If you do too, buy one from Midway or Brownell's, put it in the gun (easy to do), and sell the KAC trigger in the EE.
    Any idea what the demand is for a used, like new KAC trigger? Any idea of a fair price one could fetch?

  2. #12
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    Quote Originally Posted by PatrioticDisorder View Post
    Any idea what the demand is for a used, like new KAC trigger? Any idea of a fair price one could fetch?
    Hmmmm. I honestly don’t know, but I could take a guess for you. My general rule of thumb for selling like-new parts that came on a rifle but were replaced immediately/never actually used (which I’ve done a lot, actually: triggers/FCGs, stocks, grips, rails, charging handles, etc.) is to price them for 10-20% off the price you could normally buy it for online. So, for example, if my rifle came with a Geissele SSA and I wanted to replace it, I’d sell it for roughly $180 (normally lists for $210) shipped. It’s a fair deal since people are getting a part that is literally brand new – just not in factory packaging – for 10-20% off, and you get money you otherwise wouldn’t have.

    Using that rule of thumb, the KAC trigger lists for $330 on the website, which I think is fairly overpriced considering most people would just buy a Geissele for $210 instead. Thus, even with a “used-like-new” discount, the trigger would still be roughly $270, which I still don’t think anyone would buy in light of a Geissele. Using the Geissele SSA as a good reference point, then, I’d imagine you could sell it for between $150-200. Should that be true, you’d only be adding about $60 to the cost of the overall rifle, which is a drop in the bucket on the overall price.

    Hope that helps.

  3. #13
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    Re: KAC SR-15 E3

    Quote Originally Posted by PatrioticDisorder View Post
    Any idea what the demand is for a used, like new KAC trigger? Any idea of a fair price one could fetch?
    Based on what I've sold new ones for in the past, I'd estimate $150.





    Quote Originally Posted by PatrioticDisorder View Post
    So I've been hit with the bug to drop a pretty penny on a nice 5.56 rifle. I already own a DDM4V1 LW, which I love and love the fact I can pretty much swap out any parts that I may need to with milspec parts, so now I'm looking for something a little different. I've been up in the air with what I want, along with the KAC SR-15 E3 I've been considering a SCAR 16s (I have a 17s), LWRC SPR (with ambi controls), Noveske w/switchblock or possibly LMT MRP.

    LMT MRP & Noveske are pretty much only honorable mentions as the weight and balance turns me off, both are probably the most accurate of the bunch but I'm looking for lightweight. I currently own no NFA toys, but in the not too distant future can see myself setting up a trust and purchasing a supressor (something to consider which rifles would run the best suppressed).

    The SCAR, LWRC & KAC were pretty much at the top of my list and all have the proprietary parts. At this point I'm leaning towards the KAC as it felt great in my hands when I picked it up at the LGS a few weeks ago. It lacked the rear ambi sling attachment, but from what I read this was a KAC goof up that has since been corrected.

    So my questions regarding the KAC:

    1. I understand the E3 bolt has a life of 20,000 rounds and replacement bolts are very expenisve (like $350), but is the BCG also proprietary or is it milspec?

    2. Is there any known issue with KACs & Pmags? This is one of the things that turned me off about the SCAR 16 is pmag issues.

    3. Does KAC sell SR-15 E3 Mod 1s with Giessele trigger installed or is the only option the KAC trigger? Reading some of the reports on this forum and others about the lack of durability w/ the KAC trigger would be the main reason I'd be looking to replace it.
    Most of your questions have been answered, but I'll share my experience.

    1) BC is standard

    2) I've lost count of the number of KAC lowers I've owned, at least 4 since 2008. All of them worked fine with pmags and my current 2 lowers also work fine with tango down ARC mags.

    3) If you are thinking about the SSA, I would advise you to try the KAC first. The current triggers are NiB coated to improve durability and are quite frankly, indistinguishable from the SSA. I have an older KAC Match 2 stage trigger (from a Legacy SR15) that is hands down better than any SSA I've ever owned. If you want a Geisselle, the SSA-E will provide a more noticeable difference in pull weight, but is a little too light for my tastes on a fighting carbine. I use an SSA-E on my precision AR and like it alot for that application. Considering that the KAC trigger comes with the gun, I'd say save your money. Just my opinion, but I don't see the advantage or cost benefit of swapping it out for the SSA. For the record, I am saying that as a Geisselle fan, so take it for what it's worth. They're both good triggers.

  4. #14
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    Here's something to ponder.

    Everyone always asks about their bolts lasting or being able to swap.

    But have you ever seen or heard of one breaking?

    Stoner redesigned the bolt once he came into knights. And it's better than any other bolt out there... Period.
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  5. #15
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    Quote Originally Posted by mtdawg169 View Post
    Based on what I've sold new ones for in the past, I'd estimate $150.







    Most of your questions have been answered, but I'll share my experience.

    1) BC is standard

    2) I've lost count of the number of KAC lowers I've owned, at least 4 since 2008. All of them worked fine with pmags and my current 2 lowers also work fine with tango down ARC mags.

    3) If you are thinking about the SSA, I would advise you to try the KAC first. The current triggers are NiB coated to improve durability and are quite frankly, indistinguishable from the SSA. I have an older KAC Match 2 stage trigger (from a Legacy SR15) that is hands down better than any SSA I've ever owned. If you want a Geisselle, the SSA-E will provide a more noticeable difference in pull weight, but is a little too light for my tastes on a fighting carbine. I use an SSA-E on my precision AR and like it alot for that application. Considering that the KAC trigger comes with the gun, I'd say save your money. Just my opinion, but I don't see the advantage or cost benefit of swapping it out for the SSA. For the record, I am saying that as a Geisselle fan, so take it for what it's worth. They're both good triggers.
    Your trigger assessments above are spot on in my book. After selling several KAC triggers myself, and always watching P2P marketplaces.....$150 is really dead nuts accurate.

  6. #16
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    Re: KAC SR-15 E3

    Quote Originally Posted by Vash1023 View Post
    Here's something to ponder.

    Everyone always asks about their bolts lasting or being able to swap.

    But have you ever seen or heard of one breaking?

    Stoner redesigned the bolt once he came into knights. And it's better than any other bolt out there... Period.
    KAC has broken plenty of them, I'm sure. Enough of them to offer a 20K round warranty, which says a lot about the E3 bolts potential lifespan.

    As a point of clarification, I do not believe that Mr. Stoner actually designed the E3 system.

    It was mentioned earlier that you can use a standard bolt if necessary. This is NOT advised, as it can damage the bolt and the barrel extension. It will reportedly work in an emergency, but the likelihood of a civilian having to actually test the theory is pretty low. If it breaks, your rifle will be down for a couple of weeks until KAC sends you a replacement. Not really a big deal and as mentioned above, there has not been a single report of a broken E3 bolt in the civilian market since the E3 was introduced. Pretty impressive.

  7. #17
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    Quote Originally Posted by mtdawg169 View Post
    Based on what I've sold new ones for in the past, I'd estimate $150.







    Most of your questions have been answered, but I'll share my experience.

    1) BC is standard

    2) I've lost count of the number of KAC lowers I've owned, at least 4 since 2008. All of them worked fine with pmags and my current 2 lowers also work fine with tango down ARC mags.

    3) If you are thinking about the SSA, I would advise you to try the KAC first. The current triggers are NiB coated to improve durability and are quite frankly, indistinguishable from the SSA. I have an older KAC Match 2 stage trigger (from a Legacy SR15) that is hands down better than any SSA I've ever owned. If you want a Geisselle, the SSA-E will provide a more noticeable difference in pull weight, but is a little too light for my tastes on a fighting carbine. I use an SSA-E on my precision AR and like it alot for that application. Considering that the KAC trigger comes with the gun, I'd say save your money. Just my opinion, but I don't see the advantage or cost benefit of swapping it out for the SSA. For the record, I am saying that as a Geisselle fan, so take it for what it's worth. They're both good triggers.
    Durability would be the main reason I'd want to swap out triggers. Do you know if there is any recommendation on how often to swap out hammer springs (and trigger springs if applicable) in the KAC trigger?

    Truthfully I mentioned the Giessele but I'd be good with an ACT trigger.

  8. #18
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    I don't own a Knight's.
    But if I could, I certainly would. Their offerings are probably the pinnacle and most refined iteration of the AR platform in any caliber.

    As for the bolt, it is proprietary, but given the cost of ammo that you are shooting through it in order to get anywhere near the point of bolt failure, the extra cost of an E3 bolt is a tiny fraction of your total cost.
    Looking at the fact that, theoretically, you're not going to be changing bolts as often as you would otherwise, the extra cost either pays for itself, or ends up actually saving you money in the long run.

    Or, at least, that's what you tell the wife!

  9. #19
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    Quote Originally Posted by Vash1023 View Post
    Here's something to ponder.

    Everyone always asks about their bolts lasting or being able to swap.

    But have you ever seen or heard of one breaking?

    Stoner redesigned the bolt once he came into knights. And it's better than any other bolt out there... Period.
    KevinB said they have broken many in the 40-50k with most being suppressed and/or full auto. However Iirc he said they have not broken any under the 20k mark.
    Last edited by VIP3R 237; 07-09-13 at 19:51.
    I paint spaceship parts.

    Quote Originally Posted by Failure2Stop View Post
    Stippled Glocks are like used underwear; previous owner makes all the difference in value.

  10. #20
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    Quote Originally Posted by VIP3R 237 View Post
    KevinB said they have broken many in the 40-50k with most being suppressed and/or full auto. However Iirc he said they have not broken any under the 20k mark.
    If that is true that is amazing. 1 bolt should last 2 barrels!

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