[Weasel]

Effective range for the C7 (M16 if you are American) is maximum 300 meters with the scope. Optimal range is 200 meters. Effective fire is "FIRE THAT WILL CAUSE CASUALTIES IF APPROPRIATE ACTION IS NOT TAKEN".

Since the AK is a looser built weapon and thus not as accurate, I would say it's maximum effective range is 200 meters, optimal 100 meters.