The item sting of mrco says it's x6 zoom , and the hammer one says x10 but ... the mrco have a better zoom from hammer .__.
- Legacy ID
simple as that take the optic , right click (optic) , ctrl + right mouse button
this is the problem with arma 3, nearly every stuffs are fictive models, inspirated by real ones, but remaining fictive. so BIS is free to take any characteristics and values for his stuffs, and claim to be realistic.
MRCO, HAMMER... these things don't exist. impossible to have a clear source on a specific data or characteristic to check if it's correct or not.
BIS is free to create anything he wants, giving any values to any stuffs and claiming to be futuristic.
there is no more accuracy in term of realism in arma 3
MRCO is most likely a shortdod scope of some kind (they typically have x1-4 magnification (sometimes 1.5-6, sometimes 1-8, there many different models)).
HAMMER is acually a Leupold HAMR (http://fc03.deviantart.net/fs70/f/2012/117/4/5/leupold_hamr__high_accuracy_multi_range__scope_by_scarlighter-d4xq6y0.jpg) system so there is nothig fictional in it (except for the name of course).
ARCO is an Elcan SpecterDR sight (http://www.socomtactical.net/images/4x-elcan-specterdr-scope.jpg)
So if some research is done it's easy to find the data about it.
giving the real name is the first thing to do to get something realistic.
"the MRCO is most likely."
yes, and this is precisely the problem. "most likely" is the pretext to introduce futuristic stuffs that don't match with real models.
the "futuristic" excuse is a solution for BIS to compensate the lack of degree of realism in term of model precision and characteristic.