Prefered optics system: 4x39 Corpman Scope. Thats what Im currently running on my primary. Gives enough downrange zoom whilst allowing for a wide view angle. Theres nothing worse than having too much optical zoom on a sniper's rifle. For CQB work I prefer iron sights. I've had too many optics shot to smitherines in tight quarter games. In my 'expert' opinion (whatever that means), a well trained and knowledgable player can work just as well with irons as a $300 mil-spec optical system. Its all looks in the end I suppose.