Even on Canik's Mete sfx Pro (9mm, 5.5" threaded barrel) with the factory cut for RMRcc, the sights are barely visible with no adapter plate. It didn't come with tall suppressor sights. With suppressor sights, I expect the 6mm dot would co-witness with the taller sights. I have a green version and really like it, but it needs to be direct mounted due to it's thickness IMO.