The Magpul Industries MBUS Pro Offset Sight should work fine with that cheek riser. Since these are designed for use when the user rotates the rifle 45 degrees the cheek riser should be out of the way.
Thanks for getting back, but I had to return the cheek riser to use these. The Magpul riser doesn't just add height, it also adds width, and there was no way to get down on the stock to see these with it on, even with the rifle rotated. Thank you though!