We all know Dr. Hax, right? His signature action is to say "Hax" and throws computer screens at the target player. Why can't we do that in Blockland?
So, all it is is a weapon, preferable called Weapon_Hax. There is no item in the player's hand. The computer throw has a delay, but the "Hax" sound does not.
It fires slowly like the Shoop Da Whoop and does 75 damage. And it doesn't fling monitors continuously when firing.
You should be able to Google hax.wav for the sound.