Lasersight Bug
From WikiRaider
The Lasersight Bug will enable PC users, to shoot at targets using the Lasersight, without waisting precious Crossbow or Revolver Ammo.
This is how it's done
1. Take out any weapon combined with the Lasersight.
2. Aim at the target as usual, till you are ready to shoot. Hold the Look Button.
3. Instead of pressing Action, press 1 on your keyboard, to quick-select the normal Pistols, while still looking at the target.
4. Now press action to fire a usual bullet instead.