User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-765166-20140424003112/@comment-5716529-20140424224222

I think you have to level up  a quest you've registered, by doing it over and over, once it reached lv 100 you'll get excavated equipment in the rewards,  after killing the monster, and certain monsters give more rare 7 equipment than others. The only thing I don't like about this is that you can get random element with the weapon.