The Call of Duty: Modern Warfare 3 December 14 update is live right now, and its patch notes contain all the major changes that have arrived to this game's multiplayer. From adding preventive measures to stop players from using the Ray Gun outside of supported modes to map changes, the new update fixes a lot of things that players have been complaining about since the launch of Season 1.If you want to learn about all the changes in today's update, read on.Modern Warfare 3 multiplayer December 14 patch notesHere are all the global changes that apply to both Modern Warfare 3 and Warzone:STABILITY & PERFORMANCEAddressed an issue experienced by some players that caused items previously unlocked to become unavailable to equip.WEAPONS & ATTACHMENTS» Assault Rifles «RAM-7 (MWIII)Speedway v5 Short Barrel Attachment is now available to equip in the Gunsmith.EQUIPMENTBreacher Drone (Lethal)Improved impact detection to prevent inflicting more explosive damage to players than intended.CUSTOMIZATIONCrimson Fate and Carbon Fate Laser Attachment Skins will no longer appear as default Skins when equipped to Shotguns.Players who purchased the GG EZ Weapon Vault Bundle will now be able to use customizations on the Houndeye Integrated Optic Attachment.Animated Emblems are now properly rewarded upon reaching Prestige Levels 1-5.Note: In the coming days, we’ll retroactively grant these items to players who met the requirements prior to today’s fix.The Stormender's Priceless and Interstellar reward Emblems will now display the correct Emblem art.Modern Warfare 3 multiplayer changesHere are all the changes done to Modern Warfare 3 multiplayer in the update.UIXBug FixesKills column on the Scoreboard will now track properly in War Mode.Conversion Kits Attachment slot for certain Weapons will no longer appear locked despite requirements being met.Exiting a Blueprint Preview will no longer kick the player back to the Multiplayer menu.When using a Controller, hovering the Santa’s Slayground Battle Pass sector will no longer kick the player back to the Multiplayer menu.Clicking the 'View Bundle' button on a Battle Pass Bundle in the Operators tab will no longer kick players back to the Multiplayer menu.PROGRESSIONChallenges that require enemy Equipment to be destroyed will now progress upon the destruction of the following Field Upgrades:A.C.S.Comms ScramblerDeployable CoverMed BoxMunitions BoxPortable RadarSuppression MineTactical CameraTactical InsertionTrophy SystemFixed several challenges where progression wasn’t tracking.WEAPONS & ATTACHMENTSRay GunImplemented measures to prevent illicit usage outside of support Modes.MAPSOperation Spearhead (War)Eliminated an out of map exploit in which players were able to access an unintended rooftop near the Launch Site.Eliminated an out of map exploit in which players were able to get underneath the map near the Garage.MODESGunfightIn Private Match, split-screen play will no longer cause DEV ERROR 12744.Search and DestroyAddressed an issue causing unintended XP rates for various match events.PlaylistsIncreased Team Deathmatch and Kill Confirmed score limits in certain limited-time Playlists.12v12: 15010v10: 125Small Maps: 125Private MatchWith CDL Rules enabled, restrictions are now accurate to the Competitive Settings v1.0 specification.Training Course has returned, allowing players to learn basic movements and combat skills.PERKSGhost T/V Camo (Gear)Players can now be stationary for 2s before anti-radar effects are disabled.Another thing the developers mentioned in the patch notes was:"Based on feedback, we’ve added a grace period to the movement requirement of Ghost T/V Camo. With this change, players remain detectable by radar while not moving, but momentary pauses will no longer cause their position to be revealed."That is all there is to know about Modern Warfare 3 multiplayer's December 14 update. Stay tuned to Sportskeeda's Call of Duty section for all the latest news regarding MW3.