I just picked my Sig 238 SAS from Willamette Valley Arms. He replaced the original equipment plastic trigger with one from the guy out in Tilamook that makes the stainless steel one's. Even though he did nothing to the springs, just replaced the trigger, I find the trigger pull to be noticeably lighter and crisper. He did say it was a real pain to install, but he did a great job. I am pleased.