this Alpha One mount simply replaces the rear sight on your Glock slide. The mount sits directly in top of the slide ensuring that your optic is mounted as close as possible to the barrel bore centerline. It is the perfect mount for open style red dot sights with integral rail mount clamping systems.
• Precision CNC Machined to Exactly Fit your Glock pistols Rear Sight Cut.
• Low Mount to keep your Red Dot as Low as Possible .
• Cerakoted in a Smooth Black Finish