History
The Sneeze Powder Gun was a firearm invented by Moon Girl which launched a projectile laden with sneeze powder.
When a rat that had been enlarged by Ying attacked Yancy Street, Wasp sprung into action but was seemingly swallowed by the gigantic beast. Moon Girl then fired the Sneeze Powder Gun, causing the rat to sneeze, expelling both the miniaturized Wasp and the Black Widow Ops Program device which had enlarged the rat in the process.[1]