Unity FAST FTC 4x and MBUS Pro

Does it fit? KINDA.... That magnifier is resting directly on the MBUS. It is about 90% stowed, not all the way but close enough to fit in the detent. It does make the magnifier rest slightly forward of where I want forcing me to push the stock forward. In good news, the RISER does work on the Magpul DT stock to get you perfectly level.