Just got my Ruger PC9. From the factory the trigger pull was fairly squishy, not dissimilar to a Glock trigger. The only thing I did to it was polish the sear and hammer connection points. A lot of the mushiness went away. It is still probably in the 5.5lbs pull range, and the break is not like a "glass rod"...but it is very serviceable. If I wanted to just lower the pull a bit with minimum effect on function, I'm assuming I'd be looking at a lighter sear spring, right? I think that and eventually a swap to a metal trigger is all it needs.