The Vortex Viper is short enough to squeeze between the rear dovetail and the internal safety plunger, so you don't need to worry about your rear dovetail, just throw in a tall enough rear sight, and you'll be able to cowitness without issue.
Speaking of, cowitnessing or other sight fitment is not guarantied due to the almost infinite variety of Glock sights. If you are concerned about cowitnessing, you can send in the sights with your slide, and we can render everything up before we ever start cutting. This service is an additional fee, but especially for a duty pistol where you NEED it to cowitness, it's probably worth while.
The cost includes all tear down and reassembly, including installing new sights if you included them, and it also includes a single color Cerakote of your choice on the slide. If you want a custom color or pattern, please email or call before placing your order.