Z-8060 particle cannon

Forerunner Particle Cannons are weapons used by the Forerunners during the Human-Promethean War.

Description
Forerunner Particle Cannons are enormous floating platforms used by the Forerunners as anti-air defences. Particle Cannons project a beam of energy similar to a Sentinel Beam to disintegrate any target in range. They are however vulnerable to ground based attacks and are structurally weak in the centre, as when a shot is fired into their primary weapon, the entire cannon is destroyed.

A number of these weapons were encountered on Requiem in use by the Prometheans as anti-air defences, destroying a number of Pelicans and killing a number of Marines in the process. Two cannons were destroyed by the Mammoth deployed to the surface by the UNSC Infinity, with the Master Chief providing targeting for the Mammoth. These cannons were controlled from a central core via an AI, before it was deactivated by Cortana causing the remaning two to fire on each other.