Viper 1:
Legs: Mercer 2
Viper 2:
Arms: Scrap Iron
Viper 3:
Arms: Major Bludd (Sonic Fighters)
All other parts: Viper 1

I wanted my Vipers to look like individual soldiers, but still be instantly recognisable as Cobra Vipers. These subtle customisations add a unique look to these Vipers.