From Halopedia, the Halo wiki

The G4H-DuSH concept art from the Art of Halo 3

The G4H-DuSH is a UNSC rocket launcher which was to be featured in Halo 3. It was never implemented in the game's code, likely because the M41 rocket launcher fills the same role.[1] The weapon's name is L33t speak for "gah-dush", an onomatopoeia of the sound a rocket makes when it is launched or detonates.


  1. ^ The Art of Halo 3, page 59