The short action SENTINEL bottom metal will clear the wide Timney trigger shoe/blade/finger thingy. The current batch of long action and XL actions need to be opened about 0.015" per side to clear them.
Note that the last batch of Timney #510-Us that I received had a new narrower trigger shoe/blade/finger thingy. I am thinking that they changed the specs and standardized to this new one that is not as wide as before.
If it is a short action KMW bottom metal, you should be good either way.
Best,
Terry