Okay, let's take a look at how the grip safety is working with the trigger.
Remove the port (left) side grip.
With the trigger, grip safety (GS), thumb safety, sear spring and main spring housing (MSH) installed, check if the grip safety tang stops the trigger from moving aft when the grip safety is not activated.
Now how do we fix it? If the GS tang goes to the correct position, the tang could be too short. If the tang cannot get into the correct position, the tang may be too long or the contact position of the MSH and GS does not allow the GS to position correctly.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT