Compleation is a 
Torgue Armor Shield.
Compleation While full, instantly lose an Armor Segment.
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How to Unlock the Legendary Compleation Armor Shield
Legendary Loot
Shields
Overview
How to Unlock
Unlock Location:
- Progress through the story until reaching southwest of The Terminus Range.
- Complete the Drill Site called "The Lowering March" and at the end you will face The Battle Wagon.
Farm Method:
- Defeat The Battle Wagon in The Lowering March Drill Site.
- After use the Encore Machine nearby to reset the fight.
- Repeatedly defeat The Battle Wagon until Compleation drops.
Loveless
Visual Paradox Nexus
Rafa
Peacebreaker Cannons