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Thread: questions on KNS pins

  1. #11
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    Quote Originally Posted by jeepnut83 View Post
    I have had to use KNS pins On all of my 80% that I have completed because I do not anodize. When you duracoat a lower it makes for a slick finish and pins will walk out. but before I duracoat and I am test firing any of my lowers i find it funny that the pins don't walk out when the lower is still in the white; but spray it duracoat and the pins turn into greased little pig and out they come.
    Ok, well that might be another case for them, I have no experience with duracoat. However they are not walking because the pins or the holes are out of spec, they are walking because the finish on the gun is very slick.

  2. #12
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    Thanks for the feedback!

    After my last carbine class, I noticed the pins were spinning more freely and the trigger pin was slightly protruding on one side of my LWRC.

    I may try a set for this reason - but sounds like it's a waste to buy a set for every AR.
    Last edited by bassman2; 11-10-10 at 15:33.

  3. #13
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    I don't think they serve any real purpose. If you must have a trigger pin upgrade, get the oversized ones; they should fit snug and eliminate rotation as well. Plus they only cost $3.50. I traded my anti-rotation pin set for a Magpul BAD.

  4. #14
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    I find that a curious statement. I have never heard of pins walking loose to do some "slick finish". Pins walk loose because something is wrong. Something is assembled incorrectly or something is out of spec.

    Quote Originally Posted by rjacobs View Post
    Ok, well that might be another case for them, I have no experience with duracoat. However they are not walking because the pins or the holes are out of spec, they are walking because the finish on the gun is very slick.



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  5. #15
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    Quote Originally Posted by Iraqgunz View Post
    I find that a curious statement. I have never heard of pins walking loose to do some "slick finish". Pins walk loose because something is wrong. Something is assembled incorrectly or something is out of spec.
    I was quoting the guy above me who said the pins on his guns fit fine until he duracoated the lowers and then the pins would slide around.

    I agree with you Iraqgunz that the KNS Pins are not needed and if you "need" them, something is out of spec.

  6. #16
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    Quote Originally Posted by rjacobs View Post
    I was quoting the guy above me who said the pins on his guns fit fine until he duracoated the lowers and then the pins would slide around.

    I agree with you Iraqgunz that the KNS Pins are not needed and if you "need" them, something is out of spec.
    so far I have never seen pins "walk out" on any anodized lower that is in spec. I do know the the two epoxy mix that makes duracoat are slick in nature. and KNS pin's are like 40 bucks or less so kinda cheap insurance. I know when I did my first lower and tested it in the white and the pins stayed. then when I duracoated and the pins walked I broke out the calipers to make sure everything was in spec, and it was. so...i blame the epoxy

  7. #17
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    Quote Originally Posted by HeavyDuty View Post
    There's quite a bit of anecdotal evidence that they're useful on blowback ARs which is why I have them on my 9mm. I agree they're pretty useless on 5.56.
    Please explain why they are more useful on blowback ARs than on gas operated. Thanks.

  8. #18
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    There is a lot more stress on the pins from a blowback system, even .22.
    Independent Field Testing/R & D

    Better to die for something than live for nothing

  9. #19
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    KNS pins are retarded nonsense. Just look at some of the other idiotic products this company makes.... crosshair front sight posts for example.

    If you have pins walking out, you have other problems.

  10. #20
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    Quote Originally Posted by Captains1911 View Post
    Please explain why they are more useful on blowback ARs than on gas operated. Thanks.
    What shadow said - supposedly blowbacks are a bit harsher.
    Ken in Illinois

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