The 
Mercredi is a Legendary 
Daedalus AR that cycles between firing styles when reloaded. When a target is locked, which is achievable from its Atlas underbarrel, it gains extra damage.
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How to Unlock the Legendary Mercredi Assault Rifle
Weapons
Legendary Loot
Overview
How to Get
Unlock Location + Farm Method:
The Mercredi is available from the Vault Card introduced in Bounty Pack 2, Legend of the Stone Demon.
