Drone Cannon

The  is a weapon of alien origin which is added to Fallout 3 in the Mothership Zeta add-on. It has a unique variant called Drone Cannon Ex-B.

Characteristics
It is the removed arm cannon of a Guardian Drone. It fires a ball of energy that acts as a grenade, bouncing and then exploding after a period of about 3 seconds. Has the ability to move buses and cars before exploding. This weapon is hard in the first use, but once you understand its operation, it becomes an extremely devastating weapon.

Obtaining
This gun can be found on the corpses of alien drones, along with Alien Power Modules to power them. The cannons can also be shot off the drones and picked up like other weapons.

Appearances
The appears in the Mothership Zeta add-on for Fallout 3.

Bugs
When taking the cannon from a drone, it has no icon while in the Drone's inventory.

Trivia
The Cannon resemblesthe Big Daddy's Drill from game BioShock.