Image Description: Side view of my DIY Space Marine Chapter, the Bloody Fists. You get a good look at how the Sergeant has both hand's red, and slightly more detail, then a regular squad member. All Higher ranking members of the Chapter will have 2 red fists, where all regular squad members, and Neophyets will have one hand red.
Though descended from the Crimson Fist Chapter, the Bloody Fists take more over their cousin chapter, the Black Templar. This is seen in the fact that they train "Neophytes" in field. Every 6 Man squad has one or more Neophytes. Though relatively small chapter (about 2/3rd's the size of a regular chapter due to squad size choice) They remain ever vigilant against any sign of corruption, and especially despise the Chaos power Nurgle.