So I installed an apex dcaek kit and the new design trigger itself into my buddies full size m&p .40 and I'm having an issue. Everything worked fine when I tested each step individually and when it was all back together, until I put the rear roll pin back in that's where the problem is. You pull the trigger and nothing unless you hold it back and move the slide a little, then the trigger breaks. Tried switching the roll pins still same issue but with no rear pin or just an Allen key through it works fine. Any suggestions or input? Thanks in advance.