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Hello everyone, I put a Ar10 Elftmann Match trigger in my Sig MPX (Gen 2) a few days ago. The first day when I tried to zero it, the trigger failed to reset a few times. I have it set at about 4lbs, and I followed the installation instructions carefully, so I don't think it's user error. I tried manipulating the trigger with the upper off so I could see what is happening. I found the hammer was getting caught on the disconnector. After cycling it a few times, the problem went away so I assumed it was just new and needed to be worked in. Now however, it's impossible to fire the MPX quickly. I tried firing 1 shot, quickly releasing the trigger and pulling it again as fast as possible. The trigger was dead on the 2nd pull as if I failed to reset it properly, however after waiting about 3 seconds with the trigger still pulled, the MPX fired. So I believe the hammer is still getting caught on the disconnector and if you wait long enough, it slips free. For some reason, it only happens when I'm trying to run the trigger fast. The fastest it's ever shot is a 0.17 split. If I run the trigger faster than that, the hammer is gets caught on the disconnector. If I run it slower, it works fine. There are Youtube videos where people file down the contact points, but I'm hesitant to do that. I'll call Elftmann tomorrow, but has anyone else had this problem? Suggestions? Thanks for the help! Kurt