Rather than a civilian frame retrofitted with military armament, the BMV-M series (Bipedal Mechanized Vehicle, Military) is the result of a joint venture between Orris Aeronautics and Volk Defense International -- the two big organizations I mentioned before -- to produce a frame suitable for military use. Orris is, or was, primarily a designer and manufacturer of civilian airplanes and helicopters. Volk was always geared towards military hardware. Most known for it's development of missile defense systems, but also prominent for its early improvements to electronic radar. Think Lockheed-Martin, only much, much smaller and less diverse in its ventures.
Anyways, before frames saw extensive usage in combat, Orris believed the machines' future lay in industry. Construction, manufacturing, mining -- that sort of thing. So the company designed a frame that was tough and versatile. Built to endure the stress of constant heavy use and marketed to be effective in most fields. Thus, the grandpappy of the BMV-M, the Multipurpose Bipedal Industrial Chassis Mk.1, was born. The Bick, as it was nicknamed, saw widespread success in a multitude of industries.
Spurred on by it's profitable first foray into the world of industrial vehicles, Orris's board of directors sought to expand further. Military usage of frames was rapidly increasing in nearly every nation on the continent. Eager to get its foot in the door, Orris quickly worked to modify their existing MBIC design into a unit that would be effective on the battlefield. While the company was able to produce a rugged and agile unit, it was quickly confronted with a dilemma: The modified MBIC was not marketable. However reliable, the MBIC v2 was too fragile for ordinance disposal, too lacking in capacity for rapid transport, and too slow for reconnaissance. Orris's military future was looking bleak.
Enter Volk Defense International. An established military contractor famous for its contributions to modern military radar systems, VDI already held numerous government contracts. However, the company was finding little success in its efforts to market weapons systems. The company's designs were effective, but found to be impractical when attempts were made to implement them to existing vehicles. Volk's weapon systems program was on the verge of shutting down. However, the advent of frames on the battlefield provided a final opportunity for VDI. In collaboration with Orris Aeronautics, the company designed and manufactured a combat-capable frame with an emphasis on reliability and flexibility. The BMV-M was born.