gm_cannon_ii
A fictional mecha from the Gundam series. It first appeared in the Gundam 0083 OVA from 1991.
RGC-83 GM Cannon II
A vastly improved version of the original GM Cannon mobile suit, featuring a much more higher output reactor capable of powering twin beam cannons as opposed to a single shell-firing artillery gun and a beam saber, as well as a modified version of the Gundam Alex's Chobham Reactive Armor package for great durability - however, the type paid for it dearly, being severely hindered in its mobility.