if you do get a CM16 like i have you wont really need a scope magnification here's how scope magnification works.
In the model name "4 X 32," the number four refers to the magnification power of the scope. A 4-power scope enlarges the image four times. An 8-power scope enlarges things eight times, making it seem to be closer than when seen through a 4-power scope but the acog is not magnified as it is only 1 x 32.The number 32 refers to the size of the objective lens: 32 millimeters. The size of the lens will tell you how much light it will be able to transmit to the ocular lens. In general, larger objective lenses can transmit more light.
Thats basically how it works but since we're playing airsoft and you are getting an aeg you don't need a magnified scope unless you really want one most people on the woodland site i go to just use red dots sights or replica EO techs.