Oathsworn

"Memories of loss and dreams of vengeance, sealed in steel and composites. Mythic Shotgun with increased damage, accuracy, and rate of fire. The user's movement speed is also increased while Oathsworn is equipped."

- In-game description.

Oathsworn is a series of custom-crafted M45 shotguns used by Kelly-087.

Gameplay
Oathsworn is a mythic weapon in Halo 5: Guardians. The weapon has increased damage, accuracy, and rate of fire compared to the normal shotgun, and the user's movement speed is increased while the weapon is equipped. As the weapon has a built-in Speed Boost, users of Oathsworn receive white auras and highlights.

In the campaign, Oathsworn can be equipped if Kelly is selected by a player in cooperative play. The campaign rendition of Oathsworn is otherwise mechanically identical to the normal Shotgun, with the Speed Boost removed.

Trivia

 * The rabbit painted on the side of the shotgun is a reference to Kelly-087's nickname, Rabbit.
 * Near the trigger, the words "REMEMBER REACH" are etched onto the weapon.

List of appearances

 * Halo: The Fall of Reach - The Animated Series
 * Halo 5: Guardians