Ruyi Bang and Jingu Bang

The Gunchaku (unofficial) is Sun Wukong's weapon of choice.

Description
The Gunchaku is a dark red weapon with gold detailing that has two different forms: a Bo and two pairs of gold-chain-linked lever-action shotguns (a form in which they also double as nunchaku). The staff form appears to be quite strong and durable, in which it could send a full grown Faunus flying a certain distance, as well as able to withstand a direct shot from Roman Torchwick's cane. The staff gives off small bursts of energy from the ends when its hits an enemy, and can send out a wave of energy when slammed to the ground. In its 'gunchaku' form, it can be fired whilst being swung at an enemy, re-chambering with momentum while also being able to deflect Roman's attacks.

Trivia

 * In Journey to the West, the original novel upon which Sun Wukong's character is based, the name of Sun Wukong's staff is Ruyi Jingu Bang/Nyoi Kinko Bō (如意金箍棒, lit. Compliant Gold-Rimmed Staff). The red color of the weapons resembles the more popular variation of how the staff is drawn in adaptations of the original novel, which is a red base with occasional gold-colored ends (nodding to its translated name).
 * The attack combination where the staff is used as both nunchucks and guns at the same time is similar to the move "Fireworks" used by Dante of the Devil May Cry series when wielding the Coyote-A.
 * The fact that one of its forms is a staff may be a hidden joke: in Chinese the word "gun" refers to a staff. So Sun's weapon may be called a "Gun-gun".