Trigger pull on stock gun is a bit heavy.
1- Remove the right grip and plate that holds the trigger assembly. I didn't
have to remove the grip frame from the tube but I was doing other stuff too.
2- Polish the sear and it's engaging surfaces on the trigger and hammer face.
Don't take too much metal off or reshape, just polish it well. Taking too much
metal off could result in a gun firing when bumped or dropped. Check it when
you're done to be sure.
3- I replaced the trigger spring and made a guide from delrin rod, as it was
easily shaped with a file when spun in a drill or lathe. Total length was
just shy of the original spring. A good spring to use is a hammer spring
cut to size.
4- Put the trigger assembly back together and lube all engaging surfaces with
grease. Do not overtighten the two screws that hold the assembly together
because the gun may not cock, just snug.
I measured the pull after this simple safe mod and it was at two pounds
plus or minus a couple ounces.
To get the pull to even less I carefully checked the sear engagement and
saw that total spring and guide lenght is exactly enough to completely engage
the sear and no more. I polished the hammer face even more, paying special
attention to the sear and hammer angles, softening them just slightly.
Just over a pound now and will not discharge when treated roughly.
To make a trigger stop I made the plastic guide long enough to allow the
hammer to pass the sear on fireing and hit the frame spring stub just
at that point. The sear did not drag on the hammer as it passed by.
The last couple spring guides I made were long enough to cover the frame
spring stub and a hole was drilled in the bottom of the guide so it
could be slid over the stub. Once again the trigger stopped imediately
after firing as the length of the guide was adjusted to make it happen
this way.
