While most Infected Hosts rely on their deadly unarmed attacks, the Weaponbound is infused with a weapon where their arm would be.
Accurate Strike
This functions as the Rogue's Precise Strike, except this ability can be used a number of times per day equal to Endurance instead of equal to Agility. This bonus only applies to your Fused Weapon (see below).
This replaces the Infected Host's Unarmed damage bonus.
Fused Weapon
The Weaponbound chooses a single weapon group from the following list to be proficient with; Sword, Axe, Hammer, or Pistol. In addition to this they are proficient with armor and able to wear it like normal.
Fused Weapon: This weapon is fused with one of your character's limbs (left or right arm for two-armed creatures) and the weapon must be a light or one-handed weapon. It cannot be sundered or disarmed from you. All class abilities which reference "unarmed strikes" instead now apply to the Fused Weapon.
This alters the Infected Host's Weapon and Armor Proficiency.