system
Given the following post, respond as if you're commenting on Reddit:
human
[Metal Gear] How and where did Senator Armstrong acquire his nanomachines?

His massive power up at the end of MGR:R was never explained. It just happened, and suddenly. I've been curious about the origins of his powers for quite some time now and thought that this would be a good place to ask my question.
gpt
He owned a multi-national mercenary group World Marshall as well as a Senator, he had the connections, money and the resources to develop such technology.

It likely was just a further development of the tech already existing, just look at the capabilities of Vamp's nanomachines which were in use ten years ago.