Just Cause 2 Easter Egg - Bubble Blaster

The coordinates: x: 4245 y: 25978
You should see an old tower in a small area with small trees. The tower has window holes so that you can grapple hook into them. Inside the tower is where you'll find the bubble blaster. It has the same effect on people as a normal gun - it will kill them, only instead of bullets coming out there are bubbles.