The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for most units in the U.S. military.

Call of Duty: Mobile offers a wide variety of weapons, but only a few are as iconic as the M4 assault rifle, also popular as the M4A1 among Call of Duty fans, after appearing in multiple main series titles, including MW & MW2.