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Thread: Need help on picking a new upper - BCM or KAC?

  1. #31
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    In all honesty I think these threads are a waste of time and I hate them. Partially because of what you stated. In the end they just keep going round and round like a dog chasing it's tail.

    Is there a right answer? Who knows. In the end as long as you are buying some Tier 0 piece of shit I don't think either choice is bad.

    Quote Originally Posted by YVK View Post
    In fairness, I don't think anybody can say that KAC will "perform" better than BCM. What does "perform" mean? They will likely be equally reliable and equally accurate. In regards to weight, I am not sure KAC will definitely be lighter: it has lighter barrel profile and low-gas block, but BCM will have a shorter barrel with subsequent weight savings there. KAC is known for soft shooting properties, but midlength BCMs are very soft too. Last weekend I put 17 rounds (I don't know how to count) during VTAC 1-5 drill on 5 targets in just over 4 seconds; second time ever I ran that drill. This is with BattleComp, which is an option available when you buy EAG upper.

    I don't believe for a second that anybody can say that KAC upper will "outperform" BCM EAG upper with any verifiable performance measurement backing, and I don't believe that this discussion is about performance. If performance is at question, then data from EAG tests, the filthy 14 etc., backs BCM as second to none.



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  2. #32
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    Quote Originally Posted by YVK View Post
    In fairness, I don't think anybody can say that KAC will "perform" better than BCM. What does "perform" mean? They will likely be equally reliable and equally accurate. In regards to weight, I am not sure KAC will definitely be lighter: it has lighter barrel profile and low-gas block, but BCM will have a shorter barrel with subsequent weight savings there. KAC is known for soft shooting properties, but midlength BCMs are very soft too. Last weekend I put 17 rounds (I don't know how to count) during VTAC 1-5 drill on 5 targets in just over 4 seconds; second time ever I ran that drill. This is with BattleComp, which is an option available when you buy EAG upper.

    I don't believe for a second that anybody can say that KAC upper will "outperform" BCM EAG upper with any verifiable performance measurement backing, and I don't believe that this discussion is about performance. If performance is at question, then data from EAG tests, the filthy 14 etc., backs BCM as second to none.



    Actually Filthy 14 has broken at least one bolt, and has had others replaced. In the TE testing KAC has done they have gone much further on a single bolt than the EAG testing on the BCM gun. http://www.bravocompanymfg.com/v/vsp...hy14_oct10.pdf


    You'd have to look up the specific posts from KAC about their bolt longevity if you want to read it yourself.


    Ive owned both (still own the SR15), and the KAC is a slightly smoother shooting gun.

  3. #33
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    Quote Originally Posted by Belmont31R View Post
    Actually Filthy 14 has broken at least one bolt, and has had others replaced. In the TE testing KAC has done they have gone much further on a single bolt than the EAG testing on the BCM gun. http://www.bravocompanymfg.com/v/vsp...hy14_oct10.pdf


    You'd have to look up the specific posts from KAC about their bolt longevity if you want to read it yourself.

    .
    Yes, I am aware of that, see my above post re 16K BCM bolt life. With $300 to $70 replacement bolt price ratio, KAC bolt has to go over 64000 rounds to be cost effective, unless KAC replaces it at any point of bolt's life.


    Quote Originally Posted by bullitt5172 View Post
    This is pretty much why I asked this question. IMO, there are no better uppers (for a battle rifle) on the market than BCM and KAC. If there was really a $300 difference between them I would tend to go towards the BCM as they both meet my "requirements". I have the opportunity to get a KAC upper for the same amount as the BCM and therefore the dicussion of whether or not the KAC offers anything over the BCM if they were the same price. Confusing, yes. Petty, yes. Believe me, I know it's a win/win decision. Just looking for opinions from those who have used these uppers and can give real input.
    If you're getting them for the same price, I'd go with KAC. I don't believe it'll necessarily give you better performance, but I think it'll give you more versatility and maybe better feature set, depending on user's preference. I, for example, do not like FSBs and prefer low-pro gas blocks etc. Again, to me it is more of a feature set than performance discussion.
    Last edited by YVK; 03-29-11 at 13:50.

  4. #34
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    Quote Originally Posted by Iraqgunz View Post
    In all honesty I think these threads are a waste of time and I hate them. Partially because of what you stated. In the end they just keep going round and round like a dog chasing it's tail.

    Is there a right answer? Who knows. In the end as long as you are buying some Tier 0 piece of shit I don't think either choice is bad.
    I agree with you 100%, these "which is best threads" get old real quick and there are a lot of them on here anymore.
    Last edited by Biggy; 03-29-11 at 13:57.

  5. #35
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    Quote Originally Posted by YVK View Post
    Yes, I am aware of that, see my above post re 16K BCM bolt life. With $300 to $70 replacement bolt price ratio, KAC bolt has to go over 64000 rounds to be cost effective, unless KAC replaces it at any point of bolt's life.




    Part of the reason KAC came up with the bolt is to reduce parts wear and breakage like what Filthy 14 went through. Not saying BCM doesn't make some of the best stuff out there...just that what happened to that gun is normal. The E3 bolt addresses the normal failure points of an AR bolt. If you don't think its "worth" the additional cost then thats fine...but one is better than the other performance wise which is why KAC can put such a high round count warranty on it.

  6. #36
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    That does make sense.

    Quote Originally Posted by Belmont31R View Post
    Part of the reason KAC came up with the bolt is to reduce parts wear and breakage like what Filthy 14 went through. Not saying BCM doesn't make some of the best stuff out there...just that what happened to that gun is normal. The E3 bolt addresses the normal failure points of an AR bolt. If you don't think its "worth" the additional cost then thats fine...but one is better than the other performance wise which is why KAC can put such a high round count warranty on it.



    Owner/Instructor at Semper Paratus Arms

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

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  7. #37
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    Quote Originally Posted by Biggy View Post
    I agree with you 100%, these "which is best threads" get old real quick and there are a lot of them on here anymore.
    I'm sorry, I thought this forum was to talk about guns.

    If I was a noob and asked if I should buy a HiPoint or a LWRC I would agree with you. I have narrowed my search to two specific carbine uppers and wanted pro's and con's of each. Sorry this was a waste of your time

    Everyone else, thanks. I'll be ordering a KAC. You can close this thread so no one else ruins their day reading it
    Full disclosure - I am an Engineering Supervisor at Trijicon, Inc.

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