This will allow you to mount your Vortex Venom red dot on your standard frame Glock slide. This program will remove the rear dovetail and since the Venom does not have integral sights, you will need to mill a new dovetail to run a rear sight and cowitness. The base of the red dot sits .282" above the top of the slide, so you will need a fairly tall iron sight. Pictured here is a Trijicon suppressor height sight at .365" tall, for reference. The holes will use 6-32 screws, which should come with your Venom.