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Broken roll pin help


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Old 01-22-2014, 03:43 PM   #11
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Cheap part, broke at the stress point.

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Old 01-22-2014, 03:47 PM   #12
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Originally Posted by boudmanj View Post
I've seen it once before, it's not like I beat the hell out of the pin when I built the gun, I'm thinking it's just cheaply made. It doesn't feel as hardy as the one in my other build

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Cheaper pins may not fit the hole to spec which may lead to unnecessary torque on the pin. These are the best $5 I ever spent...

http://www.knsprecisioninc.com/gun-parts-and-accessories/trigger-hammer-pins/replacement-trigger-hammer-pins.html
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Old 02-06-2014, 05:45 PM   #13
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If you've seen two I'd probably look at getting a different supplier
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Old 02-08-2014, 06:31 PM   #14
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I think I'm going to use the anti-walk pins from now on. No grooves to weaken the pin and only $16 per set.

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Old 02-09-2014, 02:39 AM   #15
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I think I'm going to use the anti-walk pins from now on. No grooves to weaken the pin and only $16 per set.

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Exactly , I had one rifle that I was using really really light trigger and hammer springs in and because they were as light as they were they evidentally did not stay in the grooves of the pin well , I had a trigger pin slip out and drop the trigger sideways in the receiver , you know the rest of the story , it was the longest 5 seconds of hang on and keep it on target until it unloaded . I bought 6 sets of KNS pins shortly after that fiasco
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Old 02-09-2014, 02:42 AM   #16
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Quote:
Originally Posted by boudmanj View Post
This is the pin, broke at the middle groove

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Hey man if you need one of these let me know where your at and I will throw one in the mail . Free just PM me your address
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Old 02-09-2014, 02:48 AM   #17
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Quote:
Originally Posted by string1946 View Post
I think I'm going to use the anti-walk pins from now on. No grooves to weaken the pin and only $16 per set.

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Nah. Prolly was a dpms lpk. Not exactly quality. Be interested in seeing good closeups of the broken ends.

The grooves in the trigger and hammer pins are for the legs of the springs. They prevent the pins from walking. You only need kns type pins if your using a trigger pack like a timney or cmc.
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Old 02-09-2014, 02:31 PM   #18
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Nah. Prolly was a dpms lpk. Not exactly quality. Be interested in seeing good closeups of the broken ends.

The grooves in the trigger and hammer pins are for the legs of the springs. They prevent the pins from walking. You only need kns type pins if your using a trigger pack like a timney or cmc.
Jon ,
I have to disagree on this one. You have a incident like mine and one may deem them very necessary . Especially with all the light springs out there on the market . I had no intentions of ever putting them on because I thought they were more for looks beside just holding pins in . I was very wrong . For the little bit they cost they are worth having to me . Now you leave in the mil spec springs one may never have a problem .
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Old 02-09-2014, 05:52 PM   #19
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boudmanj,

Not to offend anyone but this is not a roll pin just for information. It is a Hammer Pin which is a solid pin. That was what threw me at first when you said roll pin. But no problem we all learn from posting the Threads.
First of all, the J Wire or sometimes called the J Spring is what holds the Trigger Pin in place. And your Pin broke right at the Notch which the J Wire locks into. If the J Wire is weak or broken it will allow the Hammer Pin to walk out of the Receiver and one never needs to attempt to repair it! Just replace the Hammer with a new J Wire in it. From your picture the Trigger Spring looks to be the standard spring and is installed correctly on the Hammer. And when installed in the Receiver the Hammer Spring Legs should be on top of the Trigger Pin and along both sides and against the inside walls of the Receiver and in the Notch on top of the Trigger Pin. I off hand would say you had an inferior Hammer Pin! DPMS of late has been producing some parts that were less than satisfactory. I have seen on 3 occasions with their lower parts kits where the Trigger (Box) tail section of the Trigger where the Disconector Spring goes that was around 15 degrees off center instead of perfectly straight as they should be. So I think you got a bad pin! However if it happens again you probably have a tolerance problem in regard to the Hammer, Carrier and or other fire control parts. I would suggest just replacing the Hammer Pin and probably while I was at it I would replace the Trigger Pin also just in case! Another great item is the KNS Anti-Rotate Trigger and Hammer Pin Set from KNS. They will also smooth out any trigger even the standard trigger, NM Trigger or Adjustable Trigger systems. But as stated the break you experienced is not a normal occurrence!

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Old 02-09-2014, 08:39 PM   #20
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I guess I should've said this earlier, but thanks for the help, got fixed, I know what the problem is, ****ty pin, was just askin if anyone has had the same problem with that companies product, thank you again

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