User blog comment:JoeRamirez/Call of Duty Modern Warfare 3 Weapons Wishlist./@comment-3326681-20110305024107/@comment-1916935-20110305024735

It might not take long for a gun to be made, but there's testing it needs to go through for the military to descide if they want to use it, and they they have to phase out the old guns. It just doesn't happen over night. It takes a few years