Installing 2020 Precision TSM (trigger sear mod) Slide (sear) Into Hammerpack:
Take your new TSM and align the disconnector (11) with the TSM. Insert disconnector pin (12) to secure parts in the TSM.
Disconnector pin (12) is the shorter pin.
Ensure that drop safety (17) spring orientation is correct.
Insert assembled TSM into hammerpack ensuring that the drop safety leg (17) is engaged properly into the slot of the new TSM.
Insert remaining pin into hammerpack body, passing through one side of TSM, and slide the pin through the trigger spring (14) and continue through to the other side of the hammerpack.
This will take a tiny bit of effort making sure that holes are aligned so the pin can pass through correctly.
Make sure that the trigger spring (14) is in the correct orientation.
The trigger spring (14) must be centered on the pin inside the hammerpack so that the long leg of the trigger spring (14) engages with the corresponding notch on the bottom of the disconnector (11).
*****This picture is incorrect.***** As you can see, the trigger spring leg (14) is nowhere near the notch of the disconnector (11). Depending on how you put the trigger spring (14) onto the disconnector pin (12), you may end up with the leg of the spring bound up or caught on the drop safety (17).
With spring correctly installed and centered (with leg resting in notch of disconnector), move the lower pin out half way to insert the retaining bolt lock (13) into the rear slot of the hammerpack.
Attach the hook of the trigger spring (14) into the corresponding notch of the retaining bolt lock (13).
At the rear of the hammerpack is the large hole for the sling swivel. Align that hole with the corresponding hole of the retaining bolt lock (13) and slide the pin through the hammerpack capturing the retaining bolt lock (13) into the hammerpack.
Your hammerpack should now look like this:
*****Function test the drop safety*****
To do this, press forward and down on the drop safety and carefully try to release the hammer from the slide/sear/TSM. If the drop safety does not allow the hammer to release, all is well.
If you hammer releases with this test, you need to evaluate what you did wrong and fix it.
Insert hammerpack into empty and unloaded gun and function test the hammer.
Enjoy your improved trigger pull length and reset. You also get the added bonus of a slightly lighter trigger pull.