I'm talking about Clear Sky, seeing as how the RP is closer to CS in terms of time, or am I incorrect?
In SoC I don't remember hearing 'anything' about Renegades. In CS they are normally the worst faction, and are ONLY in the swamps (which is the first level you explore/combat in. Also not sure if they're outside of the swamps but all of the bandits i've ran in to outside the swamps where in the Bandit faction, and all the bnadits in the Swamps where Renegades).
The Renegades where always armed with Low Condition (almost black to no condition left) MP5's, PMm, Sawn Off and the bandit Leaders in the awesome jacket with the hood always had the long over under shotty (forget the name).
The Bandits you encounter have some of the same stuff but they typicly had AKS-74u's kicking around amoungst the ranks and MP5's where more common.