The American Defense Manufacturing Delta Scope Mount Ring Cap is the perfect drop in upgrade for your magnified optic. It replaces the top ring on the Delta Scope Mount, and allows a red dot sight or compact laser rangefinder to be directly attached. This allows the user to engage targets at extended range with the magnified optic and close-range targets with the red dot sight, and transitioning between the optics is seamless. Features of the ADM Delta Scope Mount Ring Cap: Allows a red dot sight or LRF to be directly attached to scope mount Promotes accurate shooting at both close and long range Compatible with ADM’s Delta Scope Mount ADM 30mm Black Delta Scope Mount Ring Cap for PA RS10/Vortex Venom/Hex Dragonfly/Doctor/Noblex Footprint AD-DRC-30-BLK-DOCTOR