Yang's Prosthetic Arm

Yang's arm is a prosthesis made by Pietro Polendina and given to Yang Xiao Long after the loss of her arm during the Fall of Beacon.

Original
The arm was originally silver, before Yang painted it gold to match her remaining gauntlet.

The arm has a black base with gold plating. The fingers are golden with black joints. The shotgun function is hidden on its wrist.

Upgraded
After getting to Atlas, the arm was upgraded by its original creator, Pietro Polendina. The arm is now larger and bulkier and stronger.

Abilities
The arm was created by Pietro Polendina as a request from General James Ironwood. It is advanced enough to function like a human arm and Yang even comments that she is surprised at how natural it feels. The arm is stronger than a normal human arm and much more durable as it was able to withstand an attack from Adam Taurus's Semblance.

Yang can channel Aura through her arm, adding another layer of protection. Yang is able to detach it on command.

The arm has a built in shotgun that functions like her Ember Celica, allowing Yang to use her fighting style just like she did before the loss of her arm.

History
During the Battle of Beacon in "Heroes and Monsters", Yang's right arm, along with its gauntlet, was severed by Adam Taurus's attack. It is unknown if the weapon was recovered afterwards.While recuperate at home in Patch, a package came for Yang with her new arm. The arm was created by Pietro Polendina as a personal request from General Ironwood for Yang's bravery during the battle at Beacon.

Although hesitant at first she tried it on to train with her father. When she decided to go after her sister she painted it gold to match her remaining gauntlet.

During her fight with Adam he used his Semblance to attack but she was able to withstand it with just a few scratches on the arm.

When Team RWBY, Team JNR, Oscar, Qrow and Maria arrived at Mantle, Atlas, they visited Pietro Polendina who revealed that he created the arm. After being taken to Atlas Academy, James Ironwood decided that it's time for everyone to receive upgrades to their weapons. Dr. Polendina upgraded Yang's arm to be larger, bulkier and stronger.