X-03 | X03 | Advanced Powered Combat Armor Mk IV | Enclave "Hellfire" Power Armor | Fallout 3 | F3 | Broken Steel

X-03 | X03 | Advanced Powered Combat Armor Mk IV | Enclave "Hellfire" Power Armor | Fallout 3 | F3 | Broken Steel

This armor is the result of a post-War research and development project undertaken by the Enclave. An early iteration was completed by October 2080, and was shipped to Vault 51 at the behest of the vault's ZAX computer while the final mass-produced version would see large scale deployment in 2278. Initially, the mass-produced armor was one of several concurrently active research projects taking place at the Adams Air Force Base.