M66 Supply Unit

The M66 Supply Unit is an enemy in Xenoblade Chronicles that are members of the Mechon family. They can be found at level 49-51 in Galahad Fortress in the 1st Fuel Supply Room, 2nd Fuel Supply Room, and 3rd Fuel Supply Room. They can also drop the Refined Part Ms, which are needed for the "Restoring the Capital 2" quest but by the time the quest is available, they cannot be defeated anymore.

Chests rates

 * Wood = 77.6%
 * Silver = 19.4%
 * Gold = 3%

Wood

 * Materials
 * Refined Part M - 73.7%
 * Quality Shaft - 26.3%

Silver

 * Cylinders
 * Strength Up III - 31.3%
 * Auto-Atk Stealth III - 31.3%
 * Weapons
 * Knuckle Driver - 9.5%
 * Cloud Cutlass - 1.8%
 * Rex Biter - 1.2%
 * Armors
 * Stellar Armour - 7.5%
 * Stellar Gear - 7.1%
 * Stellar Leggings - 6.2%
 * Stellar Boots - 4.2%

Gold

 * Weapons
 * Jumbo Guarder (2 slots) - 9.3%
 * Snaer Striker - 7.7%
 * Jumbo Guarder(3 slots) - 5.2%
 * Unique Weapons
 * Dividing Line - 14.8%
 * Fish Biter - 7.4%
 * Unique Armors
 * Frozen Gauntlets - 37%
 * Blade Gauntlets - 18.5%