You will have issues with the SCS on most guns with taller sights, from what I have read, as the Tactical model is meant to be used suppressed. The sights block a good portion of the window of the rds and from what I have found out, you will have to swap out sights in order for the SCS to work. I have a VP9L with the taller sights and feel your pain. I actually went to the Viridian RFX 35 with the mounting plate and it works great with the taller sights, as all rds will, and it gives me a larger window,kind of the like the Trijicon SRO. It is also a green dot like the SCS.