Legion produced Streaming Stun Gun rifle, based on a pre-Supremacy autogun. In the early days following the Psidemic those who survived the catastrophe had lost most of their technology when the machines left. Because of this they were forced to use ancient technologies from the days before the machines produced everything. This rifle (needs a name!) is one of the early Legion patents. It's basically a pre-machine autogun with its internal workings based on the Streaming Stun Gun. These were used in the early days during the conquest of Gaia because they were cheap to produce and easy to maintain.
Whilst Legion technology has advanced in the following years, this rifle is still produced. Due to its low costs it has spread throughout the Conglomerate, be it in the hands of private bodyguards, criminals or locals in need of a defensive weapon.
Its major downside is the rifle's lack to generate a total conversion field. Most contemporary Legion technology has this capability, meaning that energy weapons do not have to be recharged since they change themselves automatically. Because of this the rifle needs a battery pack that has to be replaced whenever it runs empty. For the Legion this is very profitable since they are the only suppliers and are the only ones capable of disposing these batteries in a clean and efficient way.