The Backlash is a firearm found in Mutilate a Doll 2 but not in Mutilate a Doll 1. It significantly pushes itself backwards or opposite to the direction of its bullet when triggered. The bullet it produces appears to be as powerful or nearly as powerful as that of other bullet firearms.
0rava's Youtube video Content Week #2 - Warthog revealed that the Backlash was originally named Warthog and that it shot out a round blue projectile compared to the bullet it shoots out today. However both the Backlash and Warthog are not effective in forward shooting.