Sgt. Bill Campbell of the Gilbert (AZ) Police Department and an NRA expert on handgun optics says RDS on duty weapons is following the same trend that weapon lights on duty pistols did a few years ago. He explains that three things—pistol accessory rails, rugged lights, and light-accommodating duty holsters—had to evolve for weapon lights to catch on in police work and the same had to happen for RDS. "What we were waiting for with red dots was more rugged sights, duty pistols designed to use the sights, and duty holsters designed specifically for pistols fitted with the sights," Campbell says.
Single Focal Plane
To understand why some firearms trainers are advocates of fitting officers' duty pistols with RDS, it's important to understand the difference between sighting with iron sights, which requires the eyes to perform a number of complex operations, and sighting with a reflex sight such as a red dot, which requires one.
Police trainer Jim Dexter, who serves with the Lisle (IL) Police Department, says the single focal plane sighting system of the RDS keeps officers focused on the threat during a shooting and that can make a big difference in performance. "When officers use red dots on pistols their reaction time and their ability to remain focused increase exponentially from traditional iron sights," he says.
Faster target acquisition is one of the best known advantages of using RDS instead of traditional sights. It's much easier to put a dot on a target and focus on that target while shooting than it is to align front sight and rear sight on a target.