The National Law Enforcement Firearms Instructor Association has been running this class since 2017 or so. It and the Advanced Firearms Instructor Certification are the two most popular.
The RDS class is somewhat unique to the market in that it isn't an end user or operator class but rather a class designed to help Instructors get ready to teach pistol RDS. It is two days long and starts with a classroom block. Classroom includes an overview of different sights on the market, different mounting methods and some policy considerations. The rest of Day One and all of Day Two are spent on the range.
Range time includes some quick zeroing and then different drills that not only help build Instructor confidence but can also be "stolen" and used by the instructors at their home range.
I have been fortunate enough to help out with two of these classes and enjoy working with the instructors as much as I do shooting the various drills.
If your department is considering red dot optics or currently authorizes red dots but has no formal training/transition program, I recommend you take a peek at the NLEFIA website for more info.
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