The machine gun - is a fully automatic mounted or portable firearm, usually designed to fire rounds in quick succession from an ammunition belt or large-capacity magazine, typically at a rate of several hundred rounds per minute.
One of the greatest weapons against zombies, it is an almost guaranteed kill, It has many different sizes too! Ahh but the downsides to the machine gun, its loud, ammo can be hard to come across, can injure or even kill owner of fellow survivor if the user has no knowledge about the gun and how to use it, leaves you venerable when reloading so be prepared and take cover.
So overall, it is a great zombie killing weapon and almost guarantees a kill, but can be deadly to the user if they have never handled a gun before.
Zombie Survival Weapon Rating (ZSWR)