Cut Halo 5: Guardians weapons

During the development of Halo 5: Guardians, a number of various weapons were concepted and prototyped by 343 Industries for inclusion in the game, though were ultimately cut for various reasons.

Glass cutter
The glass cutter was likely intended to be a support weapon based around the concept of a tool developed for cutting through the glass on Meridian. The weapon was concepted by David Bolton.

Grenade launcher CLUSTER
The Grenade Launcher CLUSTER is an unused REQ weapon that can be found within the files of Halo 5: Forge. The weapon appears to have been fully modelled, textured, and functionally implemented in-game based on the existing Grenade Launcher. It is unknown why it was cut from the game.

Like other M319 grenade launchers, it can be fired immediately or held down to manually detonate on release. Additionally, manual detonation results in an EMP effect. Upon detonation, the projectile will split into 8 separate projectiles dealing damage in an area. Due to the spread and EMP effect, the secondary fire could be useful in disabling air vehicles. The splinters attempt to assemble into the same shape made by splinters of the traditional splinter grenade. Said shape is a plus-shape viewed from one side and a horizontal hexagon viewed perpendicular to that side.

Brute weapons
Files within Halo 5: Guardians show that 343 Industries was planning on releasing some Brute weapons into the Halo 5 sandbox - possibly to coincide with the release of Halo Wars 2. These weapons coincide with a new scope variant planned for inclusion for use on loadout weapons.

Brute scopes
Contained within the files of Halo 5: Forge are scopes of Brute origin. The scopes are compatible with the Battle Rifle and Assault Rifle, and may have been intended to coincide with the 2016-2017 release of Halo Wars 2 - which primarily focused on the Banished as an enemy.

Early Promethean scope
Early builds and concept art show an earlier revision of the Promethean scope available for use in the final game.

Test weapons
These weapons can be found within the files of Halo 5: Forge and made functional via modding. They consist of various weapon prototypes tested by 343 Industries but ultimately never implemented.