Glock calls it the disconnecter. You can get different ones from Glock or Ghost Inc. 3.5, 4, 5, 5.5, and I think 8 lb ones are out there. Ghost rocket 3.5 has a nub that you grind to fit that shortens the reset.
ok do you know if it is a needed spring i have seen some mods where they remove it saying its not needed if not what does it do exactly i am sorry thank you for ansering '
They say removing that spring and one other improves trigger pull '
But does it hurt the gun any.