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Thread: Non-Rotating Trigger and Hammer Pins

  1. #31
    Join Date
    May 2007
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    Deep East Texas
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    Quote Originally Posted by dialM4murder View Post
    Im curious as to how much wear the rotating pins actually cause to the receiver. How man y round would I have to shoot before this becomes an issue?
    It would take a lot of work to do that to a semi-auto rifle. My father's '74 SP1 has digested several thousand rounds a year since it was new and the pin holes still look fine. Hell, he's still using the original pins and FCG after 33yrs.

    My C3 dealer once showed me a registered M16 lower that had seen untold thousands of rounds in full-auto before the pin holes showed enough wear to cause problems. The owner was trying to find someone who could weld them up and re-drill the holes so he wouldn't be stuck with a $12k paperweight. I never found out what happened with that situation.

  2. #32
    Join Date
    Jul 2006
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    It used to bother me too, that the pins rotate in the receiver. But it has become one of the many things that "seems like it ain't right and surely is a problem but in actual use has proven not to be". I've seen pins walk too, but never, ever, in a lower that was assembled right. It's one of the few areas on this gun that can be re-assed wrong, unfortunately the consequences are swift, sure, and bad. Shutdown or burst fire and then shutdown.

    I don't believe screws belong on a gun and although I have heard of one or two J-springs breaking, allowing the hammer pin to walk, I've seen and experienced hundreds of loose screws. Trigger pins coming out are always the result of an improperly installed hammer spring. It's either on the hammer backwards or the legs are fouled in the trigger spring coils instead of laying cleanly on top of the trigger pin.

    I dunno why they didn't make these pins with a detent groove on both ends. That would reduce the chances of a walking trigger pin by 50%.
    I will say this about KNS. I was parked next to them last SHOT and WOW, what fine work they do-- I mean fine, like tiny and intricate, and fine like really, really well done. Hey-- somebody contact them and let's see if we can get them to make hammer-trigger pins that are standard except they have three, not two, detent grooves.

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