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Thread: Is there a downside to KNS pins?

  1. #51
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    Field maintenance requiring pin removal could be caused by:

    blown primer wedged in FCG
    broken spring
    hammer issues
    trigger/sear issues
    safety issues

    There are quite a few moving parts that have been known to have "issues" from time to time. Likelihood of failure? Small, but possible.

    I believe that someone in the recent Redback One class had KNS pins installed and suffered a blown primer that would not shake out -- stuck under/behind the hammer or trigger. Oddball for sure. Complete disassembly of the FCG was required to remove primer, and remedy the situation. This was done at the hotel.
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  2. #52
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    A slot cut across the top of one the retaining screws would allow it to be loosened with the extractor lip of a cartridge.

    Only one would need it done because if its not been over tightened to begin with, you can hold the trigger to the side a bit and it'll wedge the pin in such a way that it won't turn while working the screw.

    Just sayin' :shrug:

  3. #53
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    IMHO, KNS pins were designed for lowers without of spec holes. This either happened at the factory or over time (typically with a FA lower).

    So in the event that you have a lower with oversized holes, the KNS pins might be a good choice for you. If you do not, then I don't think you will gain anything.


    C4

  4. #54
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    The problem is that you aren't fixing the problem which was a worn "J" spring. I am still waiting for someone to provide me some type of proof about all the lowers that have pin hole wear causing the pins to walk loose.

    In almost every case the following is usually the cause;

    1. Incorrectly assembled lowers.

    2. Shitty ass parts.

    3. Out of spec lowers.

    I have seen M16's that were beat to shit and because they were assembled correctly with the correct parts they continued to function just like they were supposed to.

    Quote Originally Posted by Kchen986 View Post
    Had pin walk on a .308 lower. The "J" spring or whatever the hell you call it was not doing it's job in keeping the trigger pin from walking. Although the gun worked, I didn't like that after 300 rds, the pin would literally stick half-way out of the receiver.

    Stuck KNS pins on there, stopped pin walk. Loc-tite on walking pins doesn't work. Probably could have called the manuf. to get a new hammer and J spring. But the KNS pins work.

    $30 is about 100rds of ammo. If the KNS pins work for you, great, if your pins aren't exhibiting any walk, just use the factory pins and drive on.

    IMHO the only down side really is cost--in my limited experience, I've only heard of ONE trigger pin breaking (thus necessitating field repairs). Such parts wear is pretty rare IMHO.



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  5. #55
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    Really? Would you care to elaborate?

    Quote Originally Posted by wolf_walker View Post
    True that.


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  6. #56
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    Quote Originally Posted by Iraqgunz View Post

    I have seen M16's that were beat to shit and because they were assembled correctly with the correct parts they continued to function just like they were supposed to.
    +1

    I have never seen a rifle that had walking pins due to being "used"

    Every walking pin I've seen has been from junky LPKs, ****ed up J pin on the hammer, or mis-assembled LPK.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  7. #57
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    Quote Originally Posted by wahoo95 View Post
    I use them and have no problems with them. I went with them because I also run 9mm and .22lr uppers on my SBR lower which can be hard on standard pins. I have broken too many trigger pins to not use them.
    Have your 9mm bolt ramped.

  8. #58
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    Quote Originally Posted by eodinert View Post
    Have your 9mm bolt ramped.
    My 9mm bolt is ramped. Its actually the 22 conversion that seems to be the hardest on pins. Have broken 3 so far. Haven't had any issues with my KNS Pins.

  9. #59
    ares armor Guest
    *Warning* RANT post

    I have them on one of the lowers that I made with a drill press and an 80% receiver. Yes the holes are just a little out of spec on it, But i made it with my own two hands so I don't really care that I look like a "homo" on the range with my KNS's. I think you look like a "homo" if you have a serial number on your lower!

    "Oh no it will leave marks on my lower"; I spray painted (That's right, I went to walmart and SPRAY PAINTED) my whole god damn rifle... don't really care if KNS pins or any thing else causes scuffs or marks on my lower. show me your pretty rifle and ill show you an unused rifle and most likely a shitty shooter who owns it.

    "But what about in-field repair" ; Firstly how many of you have actually shot and killed another human being in a firefight?!? If you haven't stop talking about the "field" because you have no idea what your describing. If you're weapon goes down that badly in the middle of a fight, find a new god damn weapon and worry about your messed up one later when you have some time. look up the citation for the navy cross awarded to Brian Chontosh. He ran out of ammo and started picking up enemy weapons instantly. Have a look at "The Chart" apparently having a staked castle nut is desirable. so does that mean that you don't plan on removing your buffer tube in case of an "in field" problem???? What if you need to completely disassemble your bolt carrier in the "field" Oh my god... what then?

    If you are a POG, Zombie Killer or Carbine Class Commando Feel Free to Flame me for the above..

  10. #60
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    It doesn't have to be "field". It could also be in a training class or range training. In which case people are usually waiting for you to clear the issue before they continue or they continue and lose out.

    When we had the issues with our BM's blowing primers on a fairly constant basis I would have been pissed had I had to deal with the whole KNS thing.

    In your particular situation they are probably needed, not so for others who have a PROPERLY built lower. Which is what most of us have been saying from the beginning.

    Quote Originally Posted by ares armor View Post
    *Warning* RANT post

    I have them on one of the lowers that I made with a drill press and an 80% receiver. Yes the holes are just a little out of spec on it, But i made it with my own two hands so I don't really care that I look like a "homo" on the range with my KNS's. I think you look like a "homo" if you have a serial number on your lower!

    "Oh no it will leave marks on my lower"; I spray painted (That's right, I went to walmart and SPRAY PAINTED) my whole god damn rifle... don't really care if KNS pins or any thing else causes scuffs or marks on my lower. show me your pretty rifle and ill show you an unused rifle and most likely a shitty shooter who owns it.

    "But what about in-field repair" ; Firstly how many of you have actually shot and killed another human being in a firefight?!? If you haven't stop talking about the "field" because you have no idea what your describing. If you're weapon goes down that badly in the middle of a fight, find a new god damn weapon and worry about your messed up one later when you have some time. look up the citation for the navy cross awarded to Brian Chontosh. He ran out of ammo and started picking up enemy weapons instantly. Have a look at "The Chart" apparently having a staked castle nut is desirable. so does that mean that you don't plan on removing your buffer tube in case of an "in field" problem???? What if you need to completely disassemble your bolt carrier in the "field" Oh my god... what then?

    If you are a POG, Zombie Killer or Carbine Class Commando Feel Free to Flame me for the above..



    Owner/Instructor at Semper Paratus Arms

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

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

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

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