M4 rifle

&nbsp The M4 is perhaps the most common weapon featured in the singleplayer campaign and it possesses decent range, power, and accuracy. Strangely, all but two singleplayer M4's have 20 round magazine capacities, despite the magazines looking identical to standard 30 round There is no explanation given in game as to why this is, especially considering that the U.S. Military switched over to 30 round magazines in the late 1960s and has since then stopped issuing 20 round magazines to its troops. There are two exceptions; One is a M4 located in chinese and rebel armories.