User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-118.137.140.117-20121012112511

It's taken from japanese monster hunter wikipedia (Using Google Translate) :
 * Ancient civilization
 * Stage of the game, there is a period after the ancient civilizations that have advanced science and technology has been destroyed. There is no concrete explanation ancient civilization was destroyed, the existence of the ancient civilization in作中are not talking almost.
 * Although there are weapons that reproduces analyzing the things that have been excavated from such ruins, because the people of the age that is the stage of the game is inferior technically, it is possible to reproduce the functionality is difficult. Repaired using a variety of abrasives, remnants of ancient equipment that has been mined from the vein, such as has been reused.


 * It's explain why we have Granade launcher. Heck, the ancient even have magitek.