I only give you a 5 because of the lighting and shading, everything looks to bright for a chaos marine, please don't take this as an offense, think of it as constructive critisism. everything else is fine.
6 as well, with a few whys :> the chest bone work is off, worse on the chest piece, the rack is also very flat and theirs something about the helmet i just don't like. the metalics on the weapon are off too. blue glove cool, blue gun...Yuck!!