I don't know if this is how the game is supposed to be or if it is a glitch, everything I get every drop, every loot chest, every thing other than scrip and that green stuff is like 85% a shotgun or a shield, sometimes a rocket launcher or a grenade launcher. Very rarely to I get anything other than that, this is loot from mob drops though, from ark falls and loot chests shield and grenades about 95% of the time.