This assault rifle was design by the mexican defense and made by the mexican army industry , this kind of riffle is just for the mexican army, the ´police corporation no apply for them. there are different FX-05 models, all water resistance , all work under water , sea, lagon, etc.. 5.56 X 45 MM OTAN caliber, 800 round by minute, 900 meters of reach , 30 magazine capacity. the name about this assault rifle is Xiuhcoatl FX-05 , the first word in spanish mean serpiente de fuego in ingles fire snake , the lenguage is aztec , the name is in honor to HUITZILOPOCHTLI aztec´s god in the past that mean (sun´s god)

F= fusil
X= Xiuhcoatl
05- the year when it was create.