It may be a sticky someplace else, but I can't find it, so I will tell you about the "trigger job" I do on ALL my pistols. I get some Flitz (or any other metal polishing compound should do the trick), then I field strip the weapon and polish the trigger bar, contact points such as (but not limited to) the trigger safety, any humps, bumps or lumps used on the trigger bar and any other area I can see including the inner slide rail and the metal contact points the slide rides on (usually four on a Sigma/SD/Glock). I can tell you that alone will improve the trigger pull, usually removes grittyness (is that a word?) and reduces the pull by at least a 1/2 pound. I know, I know all the "old timers" will say I already knew about that, but it's nice to let other people in on it from time to time. The benifit to this method is that polishing parts should not void the warantee.