The M314 Mastodon Heavy Artillery Platform is a mobile firebase, carrying the UNSC's largest artillery piece, the 440mm howitzer. The gun is carried on the right side of the Elephant, aligned to the right of the cab. This artillery piece is the single largest gun used by the UNSC, outside of starship mounted MAC cannons. It is used as a bunker buster, a heavy artillery piece, even as a weapon to be used against low flying warships. The cannon is mounted inside a sealed cargo bay that unfolds to allow the main gun to elevate. It can be elevated high enough for a long range strike, or lowered enough to be used as an assault gun. Internally, it only stores six more rounds, but it is crewed by a pair of Wolf Exoskeletons for the purpose of reloading the gun. It is crewed by a M597 Warthog Ammu