User blog comment:JoeRamirez/Call of Duty Modern Warfare 3 Weapons Wishlist./@comment-1431679-20110706164719/@comment-3523988-20110706182423

More firepower is not the solution, usually the weight will cause the bullet to "die out". So there is subsonic ammunition, which travels fast, while being lightweight, it's also as deadly as a 5.56mm.