Since the Third World War (Red Alert 2) and the Psychic Dominator Disaster, the Flak cannon had a four legged stand for its stationery turret.
35mm twin-barreled Flak cannon
Since Command & Conquer: Red Alert 2 and Yuri's Revenge, the Flak cannon standing on four legs were exterminated from existing in the old timeline. When Albert Einstein changed the world by using his Time Machine, Romanov met Bronislav and was asked about the Flak cannon's progress in shutting down Allied air forces from the sky. Engineers worked out a Battle Bunker must be built in standing on and then, a turret of thirty-five millimetres (twin-barreled) is stationed on it and fires at enemy planes. Romanov was pleased with the plan and started to make one for his arsenal with the Allied Missile turret as a sided counterpart.
The Flak cannon was made into a thirty-five millimetre twin-barreled gun standing on a Battle Bunker made out of brick wall by Engineers of the motherland. It was used by the Soviet Commander in Command & Conquer: Red Alert 3 to deal with the Allied air force, which the Allies were superbly using them and was given to Zhana Agonskaya and Vera Belova in defeating their rival's planes from the sky, led by Giles Price.