Some of the sights on certain guns don't line up with where the firearm actually fires. I don't remember the name of it, but the second LMG you unlock in the assault class' preset 1 + 2 sights are like that. The red dot is just off compared to where the bullets actually end up going so it's frustrating and I will usually just run that LMG with it's iron sights. Also the tanks get stuck way too easily on random things and terrain, and it also turns terribly