In battle, Mai wielded a large variety of weapons. She usually hid her weapons beneath the sleeves of her robe, effectively utilizing the elements of surprise and stealth to her advantage. With her fast reflexes, cunning wits, and deft precision, Mai could use her weapons to defeat a single powerful bender or a multitude of armed or bending-capable opponents despite not being a bender herself.
Hidden beneath her sleeves and robes, Mai carried spring-loaded holsters on her wrists and ankles which held small arrow-like stilettos that she could fire off at will with a single gesture. These darts were fired with such velocity that they had the potential to pierce wood. Unlike the rest of her arsenal, Mai's stilettos had the unique ability to pierce ice without causing it to shatter. She often used her stilettos when the need arose for speed, maneuverability, and surprise, particularly when she was otherwise unable to properly use knives.
Mai carried red tinted knives which she hid inside her sleeves and robes. These were her weapons of choice and were used in almost every battle she was involved in.
Mai had a variety of knives to choose from, each suited for a different purpose. Mai used streamlined long-bladed knives for speed and added lethality, single-bladed knives, double-bladed knives thrown in a fashion similar to disks, and longer, thicker knives to better immobilize a foe. Several of Mai's knives were actually sharp enough to puncture stone, metal, and wood. Mai had shown the most skill with her knives, throwing many knives at once in one or more directions.
Unlike Mai's knives, real-world stilettos can only pierce wood and bones.
Mai also had miniature sai at her disposal. They resembled very sharp daggers with studded handles except for the fact that they were retractable, able to go from dagger to sai in mid-air or within her grasp. Mai did not use her sai often, usually resorting to them for an almost guaranteed kill such as against a powerless Katara and against Toph. Like her double-bladed knife, Mai could use her sai as a cutting edge knife as shown when she sliced through all the tapestries in Chan's home with a single throw.
Mai also used a specific type of knife that she held with her arms in an X-form, along with a more commonly used knife. It is possible that Mai used this knife a few seconds after the first one was thrown; however, both knives appeared to be very deformed when thrown, presumably because they were being thrown so fast and only seen for a moment. It is difficult to tell if it was the same knife; however, there was the same type of button-like circle and long, thin hole on both sides of the circle.