Well I simplified it a bit, the Range isn't the only attribute. When you look into 7.62\INI\Items\ADDONINFO, there's also Weight and the structural damage "Resource", but thats it then
I've changed the desert collimator to a more balanced setting in my game, so that the eastern weapons would still be useful. I really liked the way this was done in HLA, with a modular system where the sights and mountings are separate items.