I need to file some more where the armbmeets the trigger bar
The trigger block of the grip safety blocks the trigger bow in two "stages." You can see what I mean by using the following protocol.
WITH THE PISTOL UNLOADED! Cock the hammer, press the trigger without pressing the grip safety inward. The trigger should move only a short distance, if at all. Without releasing pressure on the trigger, slowly depress the grip safety. At some point in the grip safety's rearward travel, the trigger bow should be "released" by the grip safety's trigger block and the trigger thus will move further rearward. Pressing the trigger further should then release the hammer.
If the trigger movement is the same with the grip safety undepressed and depressed, the first step is to stone a little off the bottom of the grip safety's trigger block. Go slow and check frequently. When the trigger is allowed to move rearward when the grip safety is depressed, stop.
Next, the trigger should release the hammer when the grip safety is depressed. If not, this indicates that the upper part of the trigger block is now out of the way, but that the trigger block's lower part is not allowing the bow to move far enough rearward for the trigger to release the hammer. Carefully stone that surface until the trigger has enough movement. Make certain that if the trigger has a trigger stop, that the stop is not prematurely halting rearward trigger movement.
When stoning, be meticulous about maintaining the existing angles!
Does this help?
Regards,
Walt