At first glance, it would seem that a non-metal working culture is severely limited in it's ability to craft arms and armor. This is hardly the case as each non-metal working culture was never robbed of metallurgy, they never had it to begine with. They created their own weapons and armor out of different materials.
First, lets look at the available materials. Wood, stone, bone, and antler. These are all valuable items, each with a certain strong value. Wood makes for good weapons, spears, bows, and clubs that can be adorned with heads made of other materials. Stone can chipped and shaped into knives, arrowheads, and spear heads. Master craftsmen can actually fashion short swords out of stone, but such weapons are more ceremonial in nature and are not intended for combat use. Bone is another great material, easier to shape than stone, but not as durable. Bone can be used for arrowheads, knives, spears, and such. Lastly antler is easily obtained as most antlered animals shed their antlers annualy. This material has the same value as bone, but is more resistant to dryng out and becoming brittle as bone is wont to do.
Thus, archery, and spears are likely to be common weapons among the Huac-Hsantex, with others bearing stone and antler axes, and clubs. Combat is resolved with piercing attacks, and bludgeoning attacks. Knives are tools for preparing meals and ceremonial duties rather than being considered valid weapons.
Given the prevalence of piercing weapons, Huac armor is going to be designed to defeat such attacks. Huac armorers developed a rather advanced form of armor as they lacked metal working skills. The basic armor is boiled leather, but it is seldom used as it offers only moderate protection against piercing attacks, and less against crushing attacks. Brigandine is the most common form of armor, a layered suit of leather with shaped panels of stone, or bone barrels. (Think Indians)
The most advanced armor is laminated lamellor. The individual pieces are made of a composite of wood, bone, and antler sealed with resin and lacquer, all readily available in a forest. The individual pieces are woven together with animal sinew, and tough fibers of certain plants to give strength. Such armor worn over and undersuit of animal hide would offer signifigant protection against arrows, spears, and crushing weapons.
Fighting the Huac invariably comes down to one on one combat as volleys of arrows lack the penetration power to defeat their multi-layer armor. The weak points, arms and legs, can slow a wounded warrior, but seldom completely remove them from combat. The Huac make a point of demonstrating their superior armor by routinely plucking arrows from their hides and snapping them in derision of enemy archers.
Metal arrows do fair better against the armor with increased cutting power, but only an arrow designed for penetration, or attacks at very close range have a chance to defeat the protection offered.
With a measured resistance to ranged attack, the Huac seldom make an effort to be camoflaged, nd instead display vibrant and loud colored armor. The bright chaos of color combined with the near immunity to arrows often unnerves enemies of the Huac. A swarm of bright red, yellow, white, and blue warriors defing volley after volley of arrows with little to no effect can route most foes.
The Huac are proud, and cunning warriors. Several with work in concert to bring down a larger foe. A popular attack is to draw an enemy, such as an urwhor in combat with a single Huac while his compatriot makes a flanking attack against the rear of the urwhors leg, crippling the enemy.