As indicated by its model number, the MSER-04 Anf, is a redesigned version of the Human Reform League's (HRL) retired mainstay mobile suit, the MSJ-04 Fanton, for export and rental purposes. The Fanton is being replaced by the MSJ-06II-A Tieren Ground Type as the HRL turned away from fossil fuel in favor of solar energy. Differences between the Anf and the Fanton are minor, consisting of some altered armor and a new set of weaponry. Running on fossil fuel like its predecessor, the intended clients for the Anf are naturally centered on the fossil fuel using Middle Eastern nations. This is reinforced by its name, Anf, which means "Nose" in Arabic.

Export of the Anf later expands from the Middle East to the entire African continent. As a mobile suit, the Anf has exceptional low price, making it very suitable for the many poor nations in these regions as well as terrorist groups in various locations that could not afford newer mobile suits. There are also simply no better alternatives for them. Other characteristics that make the Anf popular include its low breakdown rate and a structure that can be easily repaired.