Bullett, I do not mean to be rude, how much have you fired this particular beast? Rounds through the weapon will break that trigger in, removing machining marks & burrs. If after a couple of hundred rounds (max) this is still a problem I would look for a whole new trigger. Even mil spec mass produced triggers should wear in nicely after a few mags. Any stoning of the parts is risky, unless you are well versed. A heavy trigger pull can still be crisp.