The Thrustodyne Aeronautics Model 23, also known as Jetgun, can be built on the workbench in the Town. All four of it's parts are scattered through the entire map. Being limited to carry merely one part at a time, the player has to add a certain part on the workbench every time a part has been picked up. The locations of the parts are the following:
1) The Jet Engine part can be found in the tunnel between the Busdepot and Diner.
- Near the first window on the left.
- Beside a car near the railing of the M16 Wallbuy.
- Between the first window on the right and the M16 Wallbuy.
- Between the cars to the left as you enter the encampment.
2) The wires part can be found in the second (lava) area of the Power Plant, near Tombstone.
- On the lower floor near the collapsed cat walk on the electric box.
- On the lower floor near the collapsed bridge on the ground.
- Near the Tombstone Soda machine.
- On the lower floor in the small room with the window on a barrel.
3) The handbrake part can be found in Nacht der Untoten (the Prototype) behind the corn fields. It is a pretty obscure part, so look well.
- Near the lamp
- In one of the cabinets
- On the stairway, on the right side behind the desk
4) The pressure gauge part can be found in the Hunter's Cabin between the Power Plant and Town:
- Near the fireplace
- On the bed near the backdoor