Noble Six's armor isn't just blatantly UA Mark V, FJPara Knees, nothing else.
Specifically, this is what a leak revealed through an action figure.
Helmet: Default Helmet UA Attachment
Chest: UA Base Security
Shoulders: FJPARA
Wrist: Tactical/UGPS
Knees: FJPARA
Visor Color: Gold, like almost everyone
Armor Color: I speculate that Rust is a very special color option, because it has an actual effect. Leading me to believe that it's destined for B312. But Silver or Black would represent his personality as popularly highlighted
Here's the closest thing to SPI you can get...
Helmet: Pilot
Chest: UA/Multithreat
Shoulders: ODST
Wrist: UA/Bracer
Knees: GUNGNIR
Armor Color: Olive, respectively
Visor Color: Gold, respectively