This game changes the in game M4 sound to a new and improved better sound. This mod also changes the AK47 sound aswell so don't think that this is a bug it happens because they both use the same sound bank and sounds. Please note that on the video on my youtube channel link on the website link the video shows a Ak47 as the weapon I am shooting but this mod dose also work on the M4 aswell!
Please watch the video as it means you as a downloader can tell me how to improve and make mods better.