Circuit is an uncommon knife in Murder Mystery 2 (MM2). Available to all players in the current game version. An accessible pick for newcomers looking to build a starter kit. Circuit is a knife cosmetic used by the murderer role in-game. Obtained from: Knife Box 3. Community trade value: around x4 T1 Common Weapons. Notably: The original name of this knife was "Short Circuit" This knife, along with many other knives, are from other Murder games. For example: Twisted Murderer