At an unknown part of his life, he had a major accident attempting to defuse a bomb, costing him his left arm and nearly his life. By sheer luck, he managed to survive the accident, but was left without an arm. For a few days, he had to live like this, but was offered by [DATA EXPUNGED] one day to construct a bionic replacement as an experiment. Sam accepted the offer, and the experiment succeeded. His enhanced arm now grants him abilities he didn't have prior. The nanotech can form numerous items and enhancements, from arm attachments, to independent items