I believe I read somewhere that you can put a Blackhawk grip frame with small trigger opening on a gun with a wide trigger, as long as you widen the slot in the frame.
My question is the opposite. Can you put a grip frame with a wide trigger slot on a gun with a narrow trigger? Or do you need to replace the trigger too?
YES, as posted above, what you want to do works fine. Have you considered using a wide trigger?
Also just FYI: You can use a wide trigger in a Blackhawk grip frame with narrow trigger opening (which is an old model grip frame) without widening the slot.
-The old model wide trigger is not wide all the way up into the frame.
-just trim the wide part of the trigger a little lower from the narrow top to where the narrow part extends down thru the trigger slot.
-round the edges on the back edges of the trigger where it was thinned.
-before installing the grip frame, install the trigger spring and plunger in the hole in the rear of the trigger guard as usual.
-install the trigger sideways thru the top of the trigger guard slot,
-then turn the trigger 90 degrees to its proper position, install the grip frame, and install the trigger screw.