User blog comment:JoeRamirez/Call of Duty Modern Warfare 3 Weapons Wishlist./@comment-1431679-20110706220750/@comment-1630756-20110706221901

If you actually played the original CoD then you'd know that, with the exception of the BAR, fire modes only allowed you to fire in full-auto or semi-auto. If you had it in semi-auto you didn't get any real advantages at long range and were greatly disadvantaged in close range (on the Thompson it actuall made hip fire accuracy worse). Naturally, nobody used it because full-auto was the generally superior of the two and was always as standard.