Head: Rock Viper and Magi-Sculp
Torso: Viper
R. Arm: Viper
L. Arm: BAT
Waist & Legs: 2002 Mirage
Gun: One Viper or another...
Backpack: No earthly idea
Viper 1745... A man barely alive. Gentlemen, Dr. Mindbender can rebuild him. Cobra has the technology. They have the technology to make the world's first cybernetic soldier. Viper 1745 will be that soldier, better than he was before. Better, stronger, and faster, and more loyal, thanks to the special implants Cobra Commander ordered Mindbender to insert in the CAT Viper's brain.
The Cybernetic Advanced Tactical Viper is commonly used in situations where his unique abilities would mean the difference between success and failure.