Thanks for the input so far!
The BUIS are mbus pro's, which are fairly small already. Currently the rear buis is set on the very first rail slot, so it cannot be moved any further backwards.
The main issue is I need to move the magnifier further back, closer to my head, but cannot due to the BUIS being in the way.
There's plenty of room for the mbus pro rear to fold completely flat when in between the mag and rds... just unsure if that's a good idea or not.
Not really interested in ditching any component of this setup... mostly looking for advice from others that have run a setup similar to this. Besides it looking funny with the BUIS not mounted in the rear... any problems here?
Here's what I'm thinking of doing:
