M4 Carbine

The M4 Carbine is a burst-fire or semi-auto carbine rifle/assault rifle.

Underground Railroad
The M4 Carbine appears in RisingSun2013's map Underground Railroad. For the most part, it acts very similar to the M16 from Call of Duty: Black Ops and the M16A1 from Call of Duty: Black Ops II in Zombies mode. However, it has a little more mobility, less recoil and a faster fire rate.