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Posted: 8/18/2013 6:00:20 AM EDT
I just purchased a Geissele 2 stage trigger for my ar15 colt rifle. I followed the instructions to the letter, the install did not seem to be any different than any other fire control group install. I used there trigger/hammer pins, disconnector spring, there trigger/hammer spring, and obviously their trigger and hammer. I did all the functional checks from safe to fire and they all panned out fine. When i put my lower back on my upper and racked the bolt back to measure the actual trigger pull it was somewhere in the 7-8 lb range. I feel the first stage come off at around 3lbs which is where it should, but the second stage almost takes an additional 4-5 lbs to release the hammer??? From their website it should be 4-5 lbs total pull for the trigger to release. I guess my question is where did I go wrong, this is my first two stage and i was very anal about the instructions and following them because it was a $200 trigger  . I did add grease to all the parts but even without that I would expect the pull to be less than 8 lbs....thats worse than factory single stages!!!
any help would be appreciated thanks. |
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It's a two stage..there will be tension to get to the wall and additional pressure to break the sear. Is it crisp when it breaks???
Edit...you say it breaks at 4 lbs, right? That is what it is designed to do.. What trigger did you buy??? What are you using to measure the trigger pull? |
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It is for the first break...not at all for the second. I feel it break the first time, the second i have to pull real hard...and it DOES not break crisp at all!!
Yes I can feel the first break at around 3lbs...i have to pull an additional 4-5 lbs for the second break. So its a total of 7-8 lbs before the hammer releases. Sorry if I worded that incorrectly the first time. From what I read TOTAL should be around 4.5-5 lbs...the first stage at 2.5-3.0 lbs and an additional 2-3 lbs for the second stage. That is not what I am seeing. I just bought the standard G2S trigger. Item Number: #05-145. I am using a trigger pull scale i picked up at a gun show. It reads pretty accurately for my other triggers (5-7 lbs for single stage). Quoted:
It's a two stage..there will be tension to get to the wall and additional pressure to break the sear. Is it crisp when it breaks??? Edit...you say it breaks at 4 lbs, right? That is what it is designed to do.. What trigger did you buy??? What are you using to measure the trigger pull? |
THX ill try that. 
Quoted:
It comes assembled, so probably not. 
OP, Geissele has a forum presence in the Industry section, so why not post your question there? mully Quoted:
Quoted:
Is your trigger spring in backwards? It comes assembled, so probably not.
OP, Geissele has a forum presence in the Industry section, so why not post your question there? mully |
this one right?
Since you said colt, are you sure that you have a ,154" pin channel receiver, and not trying to use a .154 FCG in a .170" lower receiver? If you need to see if this is the old problem, they try the old FCG pins in the new parts to see if they fit. Also, can try the new pins in the receiver channel, and if the fit like a BB in a box car, then you bought the wrong size FCG for the receiver. Hence, COlt just switched over to mil spec ,154 pins channels on their receiver no so long ago, and the receivers before this use .170" FCG instead. If the FCG pin size is correct for the lower receiver pin channel sizes, then did you dry fit the pins to the FCG before installing the parts into the lower? The second stage works by the disco contacting the back of the hammer hook just above the sear to add tension for the last touch of pull, and if the FCG is the wrong pin size for the receiver, then the disco engagement to the back of the hammer just above the hook is going to be all wrong. Same for the parts binding up on the pins, which will cause increased tension as well. |
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I am very impressed, I would never have thought to measure the thickness of the trigger/hammer pins....
Sure enough the colt has .170'' thickness where as the the geilssele has .154ish. I havent done it yet, but i will swap back to the old colt and try the geissele in a different lower and test it again!! Thanks, I think this will fix it. 
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Now I'm not sure if it's indicated here, but did you actually go shoot it with the new trigger? It's going to feel a heck of a lot different than your other trigger. Unless of course you had some other upgraded trigger.
I have a SD-C 2 stage trigger that has a flat bow to it and at first I said to myself, "Huh, this doesn't feel any different than my standard trigger." That was until I went to the range. There's a HUGE difference in the feel of it than when you dry fire it at home. |
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