Just finished the trigger job for my GP100, I feel satisfied! I would like to share my experience as a new GP100 owner who has not much experience on gunsmiths!
Really appreciate various posts and youtube videos, I read lots of them, finally, I decided to give it a try.
I followed suggestion from various websites and youtube videos to polish several internal parts (mainly DA sear, hammer dog, trigger surface which hits hammer dog...etc) first, I just used a knife sharpening stone with grit 1000. The above steps are really not that hard, I don't have any fancy gun smith tools. It took me about 1 hour to 1.5 hours.
Then I measured the hammer, trigger and hammer dog's clearance first, order shims from triggershims.com for hammer, trigger, and hammer dog and installed them. I highly recommend! I can feel DA is smoother and lighter but still little bit heavy, SA is very smooth and light. Hammer dog shim is not emphasized often online, but mine has a big gap 0.014, it may wiggle in DA mode, I put 0.006 shim on each side.
Finally, I install #12hammer spring and #10 trigger return spring from Wolff, I can feel DA pull is apprently lighter, SA is smooth but not smoother. I feel DA pull is very comfortable now, I don't plan to go any lighter at this point, reliability matters to me. Unfortunately, I don't have a trigger pull gauge, can not update the final DA pull weight.
As many people point out, before switching to the lightest spring, check internal parts first, deburr, polish them, and lightly oil/lubricate on metal to metal contacts. Then add shims on trigger, hammer, and hammer dog! Finally, choose different springs based on your need. Hope all your GP100 have a smooth DA pull!
Really appreciate various posts and youtube videos, I read lots of them, finally, I decided to give it a try.
I followed suggestion from various websites and youtube videos to polish several internal parts (mainly DA sear, hammer dog, trigger surface which hits hammer dog...etc) first, I just used a knife sharpening stone with grit 1000. The above steps are really not that hard, I don't have any fancy gun smith tools. It took me about 1 hour to 1.5 hours.
Then I measured the hammer, trigger and hammer dog's clearance first, order shims from triggershims.com for hammer, trigger, and hammer dog and installed them. I highly recommend! I can feel DA is smoother and lighter but still little bit heavy, SA is very smooth and light. Hammer dog shim is not emphasized often online, but mine has a big gap 0.014, it may wiggle in DA mode, I put 0.006 shim on each side.
Finally, I install #12hammer spring and #10 trigger return spring from Wolff, I can feel DA pull is apprently lighter, SA is smooth but not smoother. I feel DA pull is very comfortable now, I don't plan to go any lighter at this point, reliability matters to me. Unfortunately, I don't have a trigger pull gauge, can not update the final DA pull weight.
As many people point out, before switching to the lightest spring, check internal parts first, deburr, polish them, and lightly oil/lubricate on metal to metal contacts. Then add shims on trigger, hammer, and hammer dog! Finally, choose different springs based on your need. Hope all your GP100 have a smooth DA pull!
