I took my 870 apart some time back to try and figure out how to do a trigger job. In the end I lightly polished all engagement points, that made it cleaner and smoother but not much lighter. So I took a guess. I cut one coil off the hammer spring. Trigger pull went from 8 1/2lbs to 4lbs, not awesome but a big improvement. I'm no expert gunsmith, but I'm not to bad with rifle triggers.This is the only shotgun trigger I've messed with, so be careful with this info. It worked for me. I've not had any problems with it to date, about 200 rounds.