^^^exactly. I answered his question on m-p pistol forum.
"If you separate the slide from the frame and manipulate the trigger it will isolate where in the trigger mechanism the "glitch" is occurring. If the glitch is gone with the slide off, then the problem resides in either the engagement of the trigger bar with the safety block plunger or with the plunger itself having a rough excursion. If the glitch remains with the slide off, then your problem is in the trigger bar-spring-sear connector system, then you just need to isolate wherein it is occurring."