Weapon Tuning Update

The Weapon Tuning Update for Halo 4 was a matchmaking update on June 3, 2013, that rebalanced the weapon sandbox and increased the overall pace of the game.

Battle Rifle

 * The Battle Rifle damage has been increased. The Battle Rifle is now capable of killing in 11 bullets (four bursts instead of five).
 * The Battle Rifle rate-of-fire has been slightly decreased.
 * The Battle Rifle red reticle range (range at which auto-aim benefits kick in) has been decreased.
 * Two bursts from a Battle Rifle followed by a melee will now kill an opponent (2-shot melee).

Covenant Carbine

 * The Carbine damage has been increased. The Carbine is now capable of killing in seven rounds.
 * The Carbine accuracy has been increased (projectile spread decrease).
 * The Carbine red reticle range has been decreased.

LightRifle

 * The LightRifle zoomed rate-of-fire has been increased.
 * The LightRifle un-zoomed rate-of-fire has been slightly decreased.
 * The LightRifle red reticle range has been increased to match the updated DMR range.

DMR

 * The DMR red reticle range has been slightly decreased.

Assault Rifle

 * The Assault Rifle damage has been slightly increased. The Assault Rifle now kills in three less rounds.
 * The Assault Rifle auto-aim angle has been reduced.
 * The Assault Rifle projectile spread has been decreased.

Storm Rifle

 * The Storm Rifle damage has been increased. The Storm Rifle now kills in three less rounds.
 * The Storm Rifle auto-aim angle has been reduced.
 * The Storm Rifle projectile spread has been decreased.

Suppressor

 * The Suppressor damage has been increased. The Suppressor now kills in three less rounds.
 * The Suppressor auto-aim angle has been reduced.
 * The Suppressor projectile spread has been decreased.

SAW

 * The SAW's damage has been increased to maintain double the damage-per-second of the Assault Rifle.

Magnum

 * The damage has been slightly increased, but still kills in six rounds.

Miscellaneous

 * The damage has been increased on both the Mantis and Warthog Chain Gun.
 * Base player movement speed has been increased from 100% to 110% across all playlists and modes.

Trivia

 * The Weapon Tuning Update takes place at the gametype level, which means it does not affect Campaign, Spartan Ops, or default gametypes in Custom Games. To use the tuned settings, a player must download a matchmaking gametype, either by saving it from the Recently Played menu in-game or by downloading it from the 343 Industries File Share.
 * Prior to the update, the DMR had the fastest potential kill time and the longest range of all precision loadout weapons.