An inexpensive drop in trigger?
http://www.brownells.com/rifle-parts...prod19696.aspx
Beware that the RR NM triggers can start to lighten pull weight and go a little "mushy" between stages in as few as a thousand rounds. That only matters to service rifle competitors though.
If you can afford it, I think this is a better option.
http://www.midwayusa.com/product/247...wo-stage-matte
Timney also makes a fine trigger, and they truly are "drop in" simple.
Jimro