The Day 1 patch notes for Call of Duty: Modern Warfare 3 Multiplayer have been released by Sledgehammer Games. These changes were implemented based on feedback collected during the beta in order to provide a balanced experience at launch. The buffs and nerfs for weapons, attachments, perks, and field upgrades are now live and include changes to various aspects of the game. For example, assault rifles such as the SVA 545 received an increase in bullet velocity and lower-torso damage multiplier, while submachine guns like the Striker saw decreases in maximum damage and aim down sights time. Changes were also made to various attachments, perks, and killstreaks to further enhance the gameplay experience. Overall, the changes implemented with this patch aim to provide players with an optimized and balanced multiplayer experience.