A good 2-stage trigger can make it easier to shoot good groups, whether you're shooting off a bench, or from position, as in a High Power match. Compass Lake Engineering installs their trigger in Colt lowers with the sear block for $130, in other lowers without the block for $98. I've got their triggers in all four of my AR's, and really like them. The only limitation is that they're made to adjust down to about 3.5 lbs. minimum, so if you want an easy to adjust trigger that will go lighter than that, the Jewell sounds like the way to go.