Drone weapon

Ancient Drone Weapons are extremely powerful projectile weapons. These are capable of guided flight and must be controlled by someone with the Ancient Technology Activation Gene. Little is known about these weapons, but they have shown an ability to pierce a Goa'uld Shield.

The city of Atlantis and other cities like it have thousands of these drones that can swarm up from the city and destroy ships. They were once used in defense of Earth during the Battle over Antarctica