Had to do some research in the visual guide to double check if it was all MK IV. It is. [quote]Since Jorge is a Spartan-II I thought they upgrade their armor to the latest version when it's available.[/quote]As supersoldiers, SPARTANs are constantly being deployed to critical sites and battles. As a result, their existing dpeloyments can prevent them from receiving upgrades. A good example of this happening is actually the Master Chief. MJOLNIR MK. V started being distributed to active SPARTAN-II and III personnel in 2551. John-117 didn't receive MJOLNIR MK. V until August 29th, 2552. So for Jorge, he only had the luxury of making heavy modifications to his MJOLNIR MK. IV. Which by the way, the big pack on his pack isn't a shield generator, it's a MARK IV Field Case.