I wasn't satisfied with the factory trigger on my Sig P220 SAO, way too much pre-travel. I had a spare Gray Guns PSTR8 trigger laying around so I tried to get it to work in my pistol. I moved the over travel set screw to the front so it rests against the frame - it worked! I also polished the sides of the hammer, the sear surfaces and parts of the trigger bar. This pistol has a Wolff Springs 17 lb hammer spring in it and a Gray Guns reduced power sear spring. It currently provides a less than 3 lb SAO trigger weight. You can barely see the set screw when I pull the trigger (just above my trigger finger).
