The Leupold DeltaPoint Pro Reflex Sight coll imator's serif, when mounted, perfectly aligns with the dot, allowing simultaneous use of the collimator and mechanical aiming devices.
The metal slit is a practical addition to the collimator, which, when the collimator is damaged or the batteries are depleted, allows the use of standard sighting instruments (a change to a taller bow tie is required).
The scepter is mounted at the height of the Co-Witness, which means that it perfectly coincides with the dot, forming a single aiming line.
Simultaneous use of the collimator and mechanical sighting devices builds excellent muscle memory, repeatable composition, and makes it easy to reset the collimator after battery replacement or disassembly.
