User blog:Dan67/Rank Information for GTA Multiplayer?

I stopped playing GTA 4 since I do not know exactly what rank I have to achieve to unlock the combat helmet in multiplayer (Honestly I don't know if it's a helmet used in law enforcement or in the military so I can't quite describe what it looks like in a written response). To end this blog without wasting any more time for the staff since they got to keep an eye out for vandals, I was wondering if by any possible way that the GTA 4 page can have multiplayer information that will inform gamers on what they will unlock as well as the money requirement to reach said rank.