Argonite rapier

An Argonite rapier is a tier 7 sword released with the Dungeoneering update. It requires a Attack level of 60 to equip. It can be obtained from making which requires 2 Argonite bars on an anvil requiring 63 smithing (giving 131 experience), as a drop from Forgotten Warriors who wield them, as a drop from Har'Lakk the Riftsplitter, or from the table at the start of the dungeon floor (requiring someone with an attack level between 80-89).

Dropping monsters
Argonite rapier