The MegaCaliber Six turbolaser cannon was a cannon of the turbolaser variety, possessing incredible power. It was affixed to the rear of the First Order's All Terrain MegaCaliber Six walker. It saw action in the Battle of Crait with the objective of obliterating the Resistance's artillery located at the Crait outpost. Its design purpose was to breach the robust shields protecting enemy installations. To accommodate its immense power demands, this weapon was mounted on a uniquely engineered walker, complete with its own independent power generator and fuel cells, enabling a higher rate of fire.