Both were BCI defense lowers. I called Larue, the rep I talked to asked me to send him pictures and I did, never heard back. I’m sure they are ensuring springs are installed correctly.
It works in my LWRC lower and feels good, so I’m fine with leaving it there. Have never been a huge trigger snob, this one feels comparable to my ssa-e so I don’t mind moving the geissele to one of the other lowers.
I'm curious about the lowers. Were they already built and you were just swapping out triggers or stripped when you started?
We have 2 of the BCI lowers from the INGO buy and had problems with them. I think they were slightly out of spec. IIRC there were a couple of other people that had some problems as well. In our case it was with trying to install a Hahn 9mm adapter. It was the permanent variety, not the removable one. It wouldn't fit either of the lowers. It fit other lowers just fine though.
They were stripped INGO lowers. So sounds like an issue with them.
Yep multiple members have had issues with their BCI lowers.
My three MBT's have ran great in Anderson and PSA lowers.