If you only change the sear height, and don't disturb the bearing surfaces, there should be no need for re-hardening of the parts. I did used KASENIT hardener on this trigger, only because I have it on hand.
The trigger on my original model 24 was done some twenty plus years ago, and the parts were not re-hardened. I've had no problems with them still to this day.
Parts after hardening.
Reinstallation.
This can be the hardest part of the job for some people. It was for me as a 14 year old, when I did my first trigger job on a 24. That was because I had no idea what a slave pin was. I had to fight for ever to get the return spring back in. If you make a slave pin of the proper size, the job is a snap.
If you're not familiar with a slave pin or what it does, it's just a short section of pin used to hold another part in place.
It can be made of metal, from a section of nail or other item. Or even a piece of the plastic shaft from a cotton swab. As long as it's close to the diameter of the trigger pin, and the same width as the trigger itself.
Place the trigger spring in the trigger, in it's proper direction. (remember, you were supposed to be paying attention to that when you took it out. :) Then put your slave pin through the trigger. I like to use some gun grease on the pin and hole, as it keeps the pin from sliding out at the wrong time.
Place the trigger up into the action, with the trigger return spring where it needs to be in the trigger recess of the frame. Then line up the hole in the trigger and the holes in the frame.
Push your punch or trigger pin though the hole, pushing out the slave pin, and locking the trigger and spring in place.
If it didn't work right, try it again until you get it. They can be fussy if your slave pin is the wrong size.
There are plenty of other things that can be done to your action; stoning and polishing of bearing surfaces, sear geometry and engagement, even changing springs which I don't care for. All of these things are best left to a trained, skilled gunsmith. But honestly, this little work is the only thing I've ever done to my 24's, and it's always been plenty for me.
If you try this for yourself, please go slow, and most of all, be safe.
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