... nano-augmentations, once "installed," irrevocably alter the physiological system they affect and in many cases cause all subsequent augmentations to be rejected; however, the exact number of augmentations each system can support varies. The various interdependencies between these systems can be seen in the following table the details possible nano-augmentation combinations.
Arms: Combat Strength or Microfibral Muscle
Legs: Speed Enhancement or Run Silent
Subdermal (1): EMP Shield or Ballistic Protection
Subdermal (2): Cloak or Radar Transparency
Torso (1): Aqualung or Environmental Resistance
Torso (2): Regeneration or Energy Shield
Torso (3): Synthetic Heart or Power Recirculator
Cranium: Aggressive Defense System or Spy Drone
Optics: Targeting or Vision Enhancement
Specific nano-augmentations should be selected based on the mission profile of the particular agent...