Quoted:
3 gun trigger on a 9mm

Question on if anyone else has tried this trigger with a 9mm

So far I like it but I am having an issue where there are times the hammer follows the bolt home and then I have a dead trigger.

No light primer strikes or anything like that it just happens sometimes and each time it happens it ends up with me racking a new shell and continuing.

Wondering if maybe I made a huge mistake on a trigger and now I don't know what to do.

Quoted:
No help with the 3 gun trigger but I had the same issue with my CMC trigger. I think the issue is the ramped bolt or hammer profile of different triggers. Just a little to much ramp and you have problems with some hammers resetting, same with the hammer profile, just tiny bit to thin and failure to reset. My solution was installing an SSA trigger... not an inexpensive fix

Quoted:

What is a great trigger for 9mm ARs?

I have a few 9mm ARs.  (These are Colt/UZI pattern ARs and not Glock mag guns.)   I have found many aftermarket AR triggers do not function in 9mm ARs.  Some examples I have tried are Geissele 3gun triggers (S3G and SD3G).   This applies to ramped and unramped bolts.   I have found the same with CMC.   Neither will pass a simple function test.   Jards seem OK, but becomes unreliable in the high end of 9mm cycling rates.

I think the issue with failing to pass simple function tests is the hammers are too short and do not have a rounded head to them.   Some of these triggers with some bolt combinations will completely lock the gun up and require separating the upper and lower.  

These aftermarket triggers work fine in 5.56 and 300BO guns.   They are light, fun, and fast.   Those triggers are lighter than what I can put together for my 9mm AR.   But, my 9mm ARs can absolutely smoke them in rate of fire.    (Yes, I do understand why.)   I just want the best possible trigger in my 9mm ARs to maximize performance.  

So far, the best set up I have found is an unnotched DPMS trigger, polished, installed with JP reduced weight springs, and reducing take up with a set screw.  The pull weight will come in at 3.5# to 4.0# depending on gauge placement.   I have not found any trigger that runs better/faster than this... reliably.   This combination is fast and works with either type of bolt.     However, I would image someone out there surely has a great trigger for the 9mm AR platform that will beat what I can put together.  

I want a FCG that is :
Stone Cold reliable, from function test to running anywhere between 600-900RPM
Light in pull/weight
Short on take up and reset
Moderate price range, below a limit of $350

AND, it has to beat the DPMS style mentioned above... hands down.

Note : This will be cross posted in the AR Pistol forum/section.