Situation: medium hands. injured trigger finger (1/2" shorter than left).
Solution: reduce trigger reach
Option: install a set screw to reduce pre-travel
items needed for this project:
M3-0.5 x 6mm Socket Set Screw
M3, 0.5 thread Spiral Point Tap
2.5mm Drill Bit
IC-2000 CA Glue or Permanent Loctite
center punch (to mark the location and get the bit started)
A small file
1. Disassemble the frame and remove the trigger from the trigger bar using appropriate size punch.
2. Refer to the pictures for the location of the Set Screw. Drill and Tap from the interior of the trigger towards the left sight (trigger return spring leg rides on the right sight). *note* the surface of the trigger is very hard and not easy to drill. use a center punch to get the bit started. I used a smaller bit the get started and eventually ended up with the 2.5mm bit. *note #2* you only have one shot at this, you mess this up and you will be ordering a new trigger. so measure many times and drill once.
3. Test fit the set screw. start from the inside of the trigger. screw the set screw until it is fairly flush with the inside if the trigger to prevent interference with the trigger bar when it pivots. *see pic*.
4. Time to set the screw in place. I use IC-2000 here as I already have it for applying grip tapes on my guns. you may also use permanent loctite which requires lengthy cure time (drop in small zip loc and squeeze out air to speed up curing). apply IC-2000 to the threads then screw in place.wipe off excess. set aside to cure (approx 15 min).
5. Using an appropriate size hex wrench, test to see if the screw has set in place. you should not be able to turn the wrench with minor pressure.
6. Filing time! the idea here is to file the set screw until the trigger have just enough clearance to reset WHEN THE SLIDE IS INSTALLED. on a perfectly filed set screw, THE TRIGGER WILL NOT RESET WHEN THE SLIDE IS OFF THE FRAME. when the slide is installed, it moves the hammer back slightly which creates more clearance for trigger reset. If the trigger resets when the slide is off, you filled too much material. it will still work but the reduction of trigger reach is not as substantial. it is a good idea to pickup several set screws. there is going to be a lot of assembly/disassembly in this step so be patient and remove a little bit at a time. the extra set screws can also be used to replace the factory short overtravel stop should you want to reduce the overtravel after the sear is released. same idea, file to fit.
as you can see from this video. there is no trigger slack after the reset