Quoted:
FWIW, I have a milspec fire control assy that came as part of a DPMS lower parts kit.  In several steps, I polished the trigger/hammer engagement surfaces with 600 grit sandpaper, applied some moly grease.  That got the letoff down from a gritty 6 plus pounds down to a nice smooth 5 plus pounds.  No crisp break, of course, but there is a little bit of stacking towards the end of the creep.  Recently, I added a set of JP yellow springs, polished the surfaces some more and reapplied the moly grease.  Now its down to about 4 lbs total pull weight and smoother than ever.  Probably too light for NRA competition, as if I cared.  The hammer pops my Rem 7-1/2 primers no problem.  I still wish I had a clean break, like my model 70 Winchester, but I'm happy with what I have, so far anyway.  - CW