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Posted: 1/5/2009 2:25:10 PM EDT
| Any need to install the 2 lock down allen screws that come with the above if you're using the KNS trigger/hammer pin system? Those screws only appear to lock the standard pin(s) in place AFAICT. The Timney housing fits snugly in my lower so there no side to side play. |
I have a Timney.
Yes, you should tighten down the allen keys. You could otherwise run into problems with your safety selector. Also, KNS anti rotational pins aren't at all helpful with your Timney. The Timney has proprietary internal pins. Your pins cannot be turned by the trigger. The allen keys snug the trigger up against your pins. If the Timney didn't have propriatary pins you could overtighten and cause the "trigger group" to bind. Save the KNS for another build. I use KNS on all other ARs as an insurance policy. If it would help with the Timney I would use them there as well. |
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Check it out... See the pin holes? That is
a solid tube that continues through the trigger body. You can see in this pic how the hammer rotates on the tube. Your job is to tighten the allen screws to make the triggers tube tight against your pins. 
Your pins can't move in spite of pullung the trigger 1,000,000,000,000, times! 
So fire away! The disconector will wear away to nothing before your pins ever turn. 
Hope this clears up any confusion. 
ETA: These smileys are fricken stupid 
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| If the set screws come loose the standard pins will fall out. I have KNS pins on my 9mm but not on my .22, both with Timney triggers. Maybe you could loosen the set screws with the KNS pins in and see if there is any unwanted movement. If not, the set screws don't matter much. I might try this soon. |
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Thanks for all the responses!
I realize the KNS pins aren't needed technically with the Timney system but I already had them so why not use them. What I am still not clear on is whether the two allen keys are there to hold the entire group in position or just keep the stock pins from drifting. Obviously the kns pins can't drift unless to screws holding the pin assembly come loose. These is minor play side to side with the KNS pins to begin with so tightening the allen keys would stop the lateral play in the kns pin assembly (the tight fit of the Timney assembly allows for no side to side movement) but since there are no grooves in the Timney pins I figure the KNS assembly is designed not to be tight against the receiver and be able to move side to side slightly. I don't feel any real movement in the assembly up/down against the pins either so I don't see what purpose the set screws serve (if their primary purpose is to eliminate any minor slop in the assembly I'm not seeing it) other then to hold the stock pins in place. The trigger function and safety seems to work fine without them, at least on the bench. |
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