Can Angle Shot detach an already attached equipment and attach it to another unit in one go?

Ruling: Yes, Angle Shot can attach already attached equipment to another unit. The inactive text rules don't prevent this.

Nuances:

• While equipment is attached, its equip ability is inactive and cannot be activated directly
• The equip ability can still be referenced by other effects (like Weaponmaster) even while inactive
• You cannot use an attached equipment's own equip ability to move it to another unit (except in special cases like Weaponmaster)