Unlike most people here. On my G21 gen4 I didn't care for the factory trigger so I went all out. I got a lone wolf 3.5# connector. A wolf springs competition spring kit. A phantom aluminum adjustable trigger with chrome bar. And I did a good polish. These mods were a huge improvement (imo) over stock. To me the factory trigger was too sloppy. Lots of pre-/ over-travel with a 5.5# kind of spongy pull. Now I have a very clean crisp brake at 3.25ish# pull. Almost no pre-travel and little over-travel. Not to mention the billet aluminum trigger is very comfortable. Feels kinds like a 1911 trigger.
It went from ok to match grade.