Just FYI: I just added the Aimpoint 3x Magnifier to my EOTech 551 with a Samson RT flip mount and it ROCKS!!! At a flip of a button the Magnifier moves to the right of the flat top (ejecting casings do no hit it) and I'm quickly back in CQB. Flip back in and I'm zoomed (Magnified) 3x. The center DOt of the EOTech goes from 2 MOA to around 6 MOA.
I'll post pic's if anyone is interested.