The Leupold DeltaPoint Pro is an optic designed, by request of operators, to put a robust red dot sight on a combat oriented pistol. Leupold beefed up their DeltaPoint sight and released the Pro model with a host of upgrades. The larger optic window increases the field of view without looking out of scale to a pistol slide. This make it much easier to find the dot compared to a smaller optic like the Trijicon RMR.
The Rear Sight mounts to a Leupold DeltaPoint Pro and allows for quick re-zero if the battery dies or the red dot fails. We keep back-up sights on rifles, and this provides an integrated solution for shooters who have invested in the DPP from Leupold.