Whenever a Glock, ‘Safe-Action’ trigger is pressed - but NOT pressed all the way to the rear, thus, fully releasing the striker lug - the mechanical relationship between the sear, and the striker lug changes.

The edge of the sear does NOT return to the exact same spot it was in, higher up, on the striker lug before either light, or repeated pressure was applied to the trigger, and/or trigger bar.

This is the reason, ‘Why’ the sear’s, ‘kick plate’ angle has been...