Z-510 focus turret

The Z-510 Directed Energy Focus Weapon, alternatively known as focus turret or beam turret, is a Forerunner directed energy weapon emplacement.

Description
The Z-510 beam turrets are turrets of a similar nature to those located on Shield World 0459, but smaller in scale. They are typically constructed by Watchers and possess a deadly, long range beam weapon, akin to a Sentinel Beam. When destroyed, Forerunner beam turrets disintegrate in a manner resembling that of Promethean Knights.

Operational history
During the Battle of Draetheus V, the Covenant managed to use some of these turrets against UNSC forces.

In July 2557, John-117, and later the crew of the, faced several such turrets inside the shield world Requiem. Later, a number of these turrets were hacked by Cortana on the Mantle's Approach during the Didact's attack on Earth, during which time they took on a blue light, like those of the Sentinels on Requiem, as opposed to the characteristic orange coloration of those under the Didact's control. The turrets temporarily repelled waves of Crawlers to help John-117 on his way to destroy the Composer.

When the Infinity returned to Requiem in 2558, several beam turrets were again used against UNSC forces. Fireteam Crimson faced numerous turrets during their missions. At some point, the Spartan-IVs were able to turn the turrets of the location "Control" into allies. Later, when the Spartans searched for Dr. Halsey's signal at Cyclone, the Librarian provided them support with some allied beam turrets along with Aggressor Sentinels.

List of appearances

 * Halo 4
 * Spartan Ops
 * Halo: Spartan Assault