The Leatherwood Automatic Ranging Trajectory (ART) rifle scopes feature a machined integral mount that adds external elevation to compensate for your bullet drop.

By setting the cam on the ART scopes, we essentially match the trajectory curve of our round to the curve of the cam. Once set, the ART scope will automatically compensate for bullet drop with a turn of the cam. All the shooter needs to do is Frame, Aim and Shoot!