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.

Role in multi-player games\n\n Euchre, 500: As the highest trump or "top Bower". Canasta: The Joker, like the deuce, is a wild card. However, the Joker is worth fifty points in melding, as opposed to twenty for the deuce. Gin Rummy: a wild card, able to be used as any necessary rank or suit to complete a meld.

Joker can also be played at the end of Batman: Arkham Knight and in the middle of Batman: Arkham Origins as Red Hood.