What does your sear look like? Mine seems to be standard. The bottom where the trigger goes is a C shape with the open end of the C pointing toward the bottom of the sear. I was advised to grind the sear's guide wings/rails down and weld its guide on the bolt a bit up from the bolt hole. I assume this was to reduce travel distance on the sear, making in SA only, but the guy also stated that it also needed a disconnector. Where did you get yours from?