M4

M4 may refer to:
*M4A1 - An assault rifle featured in the Modern Warfare series, as well as in Call of Duty Online, Call of Duty: Heroes and Call of Duty: Mobile.
*M4A1 Tech - An assault rifle in Call of Duty: Online.
*M4LMG - A light machine gun in Call of Duty: Online and Call of Duty: Mobile.
*M1014 (or "M4", as called in some other languages) - a shotgun in Call of Duty 4: Modern Warfare, Call of Duty 4: Modern Warfare (DS), Call of Duty: Modern Warfare 2, Call of Duty Online, Call of Duty: Modern Warfare II and Call of Duty: Modern Warfare III.
*M4 Sherman - An American tank featured in every World War II-era Call of Duty game.