I was out shooting and at the end of the session I noticed my bottom trigger pin had walked out toward the side with the bolt release. Is a set of KNS pins the solution? Lower is a LMT with daniel defense trigger. Thanks.
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I was out shooting and at the end of the session I noticed my bottom trigger pin had walked out toward the side with the bolt release. Is a set of KNS pins the solution? Lower is a LMT with daniel defense trigger. Thanks.
Just from this little info, it sounds plausible that your hammer spring is not resting on your trigger pin like it should. The legs of the spring should be riding in the grooves of the trigger pin, capturing it in place. Being that your lower is not a factory build (self built?) that would be my guess. KNS pins really don't solve anything more than in-spec and properly assembled parts do.
The hammer spring should be positioned like this.
http://img.photobucket.com/albums/v5...e/IMG_8295.jpg
Problem solved, I had the hammer spring on upside down. Thanks for the replies gentlemen.
Not an uncommon issue and often accompanied by light primer strikes.
It raises the point though are those fancy pins worth anything? I've never had a pin walk and I've only ever used the regular ones.
I suspect most people use them because they think they look cool.
I think dimpled trigger pins look cooler...
http://www.expeditionexchange.com/lw...c003%20018.JPG
I heard the KNS pins were also used to prevent pin rotation so it reduces wear on the lower receiver? I have seen my hammer pin rotate while dry firing but did not think much of it because it would take a long time to wear out if it did at all. What are your takes on that?
The KNS pins took out what little creep I had with a DD FCG. The trigger started off sweet to begin with, and with the pins it ended up near perfect (for me). The closest you can get to no creep, and snaps like a carrot. I don't need an aftermarket trigger now.
Edited to add. I don't think they look cool. They look stupid, but my trigger is much better now.
I have KNS pins on 4 of 5 carbines and a friend and I recently had this discussion at the range. I too noticed that they can actually change the trigger pull on a carbine. I think it is the trigger rotating on a smoother stainless steel pin rather than rotating on the stock pin, or rotating the stock pin in the receiver. It is admittedly only a very slight difference but I could feel it too.
While the KNS pins are not necessary for a correctly function FCG they do offer an advantage for me that makes them worth the $25.
Cameron
^^^^^^^^
Agreed.
In my case, I have a set of 0.155 KNS pins on the way because of a lower with "fat" trigger and hammer pin holes. I have mixed, and matched FCG components to try and get a consistent trigger. . Hopefully the KNS pins help alleviate some inconsistencies on a crappy lower.
The offending lower is a registered Olympic Arms unit that is registered in the state of CA as an assault weapon. Yes, I know it's a turd. Yes, I know the state sucks with regard to firearms, but it is what it is and I am trying to get the most out of the item.
The pins should never walk out on their own, like you found out.
I use these KNS anti-walk pins because I like how they look, but also living behind enemy lines, I run pre-ban lowers which around here are big bucks.
So these pins keep the pins from spinning, which in a long time might wear the holes in the lower bigger.
Really, KNS pins aren't needed in normal use.
This is anecdotal so take it for what it is worth, but at my last unit we had a pretty good number of A2s with older lowers that had been converted over to A2. Out of curiosity, I checked the serial on mine and found out that it had been made in 1965. Now, I couldn't tell you how much that thing had been shot but I'd wager that it has quite a few rounds through it and it was full auto for the better part of two decades, the trigger pin holes were fine.
A lot of the other lowers we had were in that serial number range or even older and they all looked fine as well (though some of them were pretty beat to hell). Now our practice mags on the other hand, were a source of frequent frustration.
I put a set on my POF, only because of concern over the unique (and jarring) nature of piston recoil. For $30, it seemed like good insurance - especially since I popped the Timney trigger OUT, in favor of a 2-stage. Pistons cause enough problems elsewhere - I didn't want to find my pins popping out on the range!
I use KNS pins on most all my builds. I like the way they look, I know the pins will not spin or walk, and the stainless pins feel smoother.
$30 for a $1200 rifle isn't much.
Shadow
Have you noticed your trigger pull improved as someone stated earlier? I've never used them but that would be a positive.