Just tried this on my home built AR. I think that it has a DPMS LPK in it, and the trigger is pretty rough and heavy. Although this did smooth it a little it was not nearly as much as i had hoped. Especially when i compare it to my wife's AR that was built with the same kit as mine. There is very little difference other than hers feels a little more coarse. Oh well, will be getting a RRA 2 stage on the way sometime in the near future.
Putting the ream in extreme.