I've been looking at a new trigger for my AR and ran across this.
"The new Timney AR Targa 2-Stage Trigger is a self-contained, 100% drop-in unit that is ready to install in your AR-15 for an exceptionally smooth, crisp, two-stage trigger pull. The pull weight is factory calibrated for a three-pound first stage and a two-pound second stage"
How the heck does that work with a three pound first stage but a two pound break? How the heck could you even feel the break point? Can some one describe to me how 2 stage triggers work?