i dont have any assault rifles. i do have about 5 ar15 and 2 ak47.
i dont care for optics on the ak's its just not a good gun for them.
on my ar15's it depends. for my ohsht rifle i use an acog, precision ar15 i use a nightforce 12-45x benchrest, my wife likes the aimpoint rds.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent