Matter AntiMatter Reaction. The primary method of power and thrust production in the Empire and most first-world nations in the known galaxy. The use of fundamental charge inverters makes the storage of anti-matter a non-issue, allowing these reactors to run on any matter that can be powdered or liquified into a useful fuel state and producing antimatter from it as needed. MAMR rockets are generally outfitted with electro-magnetic gamma shielding when used on vessels intended to operate in atmospheric conditions or in heavily trafficked areas, to limit the amount of gamma radiation left in their wake.