The MP99 (A.K.A "Thompson M1899") is a submachine gun variant of the Thompson Submachine Gun that was developed in Germany during the late 19th century. This, like the STG-99 was lost for the next 138 years until the year 2037, when the designs of both weapons were found by the Anti-Amazons. Division Delta Codenamed:Anti-Virus, the New Amazons and the South Korean Anti-Bioterrorism Force are known to have captured these weapons while battling the Umbrella Fascist Group. Unlike the regular Thompson, this weapon fires both the standard .45 ACP and the 9x19mm Parabellum.