This sound is from Light Machine Guns - Call of Duty: World at War - Weapons (PC - Computer)

Two downloadable content packs were released for it post-release. Each contains five new multiplayer maps, with some being remastered maps from Call of Duty 4. A version for macOS was developed by Aspyr and released in May 2014. The Xbox 360 version was made backward compatible for the Xbox One in 2018.
See also: Tactical shooter, Metro: Last Light, Battlefield 3, Shooter game, Gears of War 2, Warframe.