To get the Fire Launcher blueprint you must protect a salesman named Faruk from the Zombies and escort him to the tower. Location: Escort Salesman reward Ingredients: 2x Metal Parts, 1x Duct Tape, 2x Kitchen Stuff, 2x Chemicals, 2x Aerosol, 1x Electronics Adds Level 2 Impact and Burning to Wrench, Crowbar, Baseball Bat, One-Handed Axe, Police Baton, and Small Hammer Video Guide: http://youtu.be/EIEV_skFniw
