Depends on the mission. At night with NVGs I'm going to put on my PEQ-2 in addition to my EO Tech.
In case some of you aren't familiar with a PEQ-2
AN/PEQ-2 - Wikipedia, the free encyclopedia
In a city I may not put on the EO Tech 3x magnifier, in the mountains or rural areas I would.
I always have my short VFG, primary optic, and sling (with an extra battery). Depending on how mobile I am doing to be I may or may not slap on the Harris Bi-pod because that does put a lot of weight toward the end of the barrel.