I never had a problem with my Comp M2, but it can be a little more noticeable with the Micro, IMO. However, run the optic at the front of the upper receiver (not on the fore end), shoot both eyes open, and play with it for more than five minutes. If you do that, the feeling of looking through a doughnut hole will go away.
The only thing necessary for evil to triumph is for good men to do nothing.
I HIGHLY recommend Google Chrome and Adblock to all world wide web users. (I would have left GT a long time ago without these extensions!)