Mercury Arms is a publicly owned arms manufacturer based on Mercury. The vast majority of the weapons and ammo that Mercury Arms produces is built by prisoners from the Solar System. The company supplies roughly 40% of all of the UEC military's guns and ammunition, as well as being the most popular and widespread consumer weapons manufacturer across human space. Political activists have criticized the company for exploiting prisoners for the sake of war. While push-back against the company has grown over the years, it still stands strong and successful even as the galaxy suffers through the recent depression.