-10 points for spelling in the title lol, just kidding buddlff said:
I suggest changing the recoil and trigger springs and the connector but it depends on what model Glock you are doing it on... I have also heard many people changing to a lighter recoil spring and lighter connector but then adding the NY-1 trigger spring to make it more crisp and less slack in the pull... I have only heard these upgrades being used but never experienced it for myself... Others here may know more about this and can help out more than I can but hopefully I have helped point you in the correct direction, keep us posted on what you find out and any upgrades you decide to do