I run several guns that tight on the overtravel. If it cleanly releases the striker with a mag inserted, it’s generally good to go.
that said, if it bothers you, the problem is you need to slightly reduce the overtravel on the trigger shoe. The old grayguns trigger kit doesn’t have that option.
one thing to check is is the trigger stop pin is slightly bent, this can easily reduce the overtravel and make the trigger not work. Other than that, there probably isn’t much you can do with the kit you have.